CONTACT US - Calstin

Welcome to the official contact page of Calstin. We greatly value every customer’s inquiry, feedback, and suggestion, and we have established a simple, efficient, and professional customer communication system to respond to all your needs in a timely manner. As a professional one-stop phone case collection store committed to providing high-quality, cost-effective, and diverse mobile phone accessory products, we insist on maintaining sincere and transparent communication with every customer. To ensure all consultation, after-sales, cooperation and feedback information can be accurately recorded, efficiently processed and professionally replied, email is our only official and exclusive contact channel. We do not provide telephone consultation, social media accounts, or any other online instant messaging contact methods. All kinds of questions and demands from customers will be uniformly received and processed through our official business email, ensuring standardized, formal and effective communication services for every user.

Our Official Business Email: CustomerService@calstin1.com

Our store’s official business email supports 24-hour all-day unrestricted contact, with no time limit for message submission. Whether you have questions during working hours, or send consultation messages in the early morning, late night, holidays or weekends, your emails can be successfully received and stored by our customer service system. We fully understand that customer needs and doubts may arise at any time, so we have opened round-the-clock email receiving service to avoid missing any customer demand due to time differences or working hour restrictions. No matter you are a new customer consulting product styles, model adaptation, material characteristics and price information, or an old customer with after-sales questions, product usage feedback, order consultation and service suggestions, you can send detailed content to our official email at any time.

In terms of response efficiency, we have always adhered to an efficient customer service standard. Our professional customer service team is on duty and checks the official email inbox regularly throughout the day. We promise to provide a formal, detailed and targeted reply to all valid customer emails within 2 hours. Each email will be sorted, classified and assigned to special customer service personnel for processing according to the type of demand, including product consultation, order inquiry, after-sales processing, customized demand consultation, store cooperation intention, product improvement suggestions, complaint feedback and other different types of information. We refuse perfunctory template replies, and every reply will be targeted at your specific questions, providing accurate, practical and detailed answers and solutions, to ensure that every customer’s problem can be effectively solved in the shortest time.

All customer communications are completed through official email, which is also our exclusive formal communication channel. This unified communication mode can effectively avoid information omission, confusion and loss caused by multi-channel scattered messages. Every email you send will form an independent formal record, which is convenient for subsequent follow-up processing, problem tracking and service optimization. For product consultation, you can describe your mobile phone model, favorite style, functional needs and budget requirements in the email, and our team will recommend suitable phone case products for you professionally. For after-sales problems such as product quality, adaptation problems and shipping problems, you can attach detailed text descriptions and corresponding picture materials, and we will verify and solve the problem efficiently and give a satisfactory processing result.

In addition to online email consultation services, we also have an official physical store address for offline display and business docking, which facilitates offline customers’ on-site visit, inspection and negotiation.
Our Official Offline Store Address: No. 33, Zumiao Road, Chancheng District, Foshan City, Guangdong Province, China.
Postal Code: 528000

Our physical store is located in the core business area of Chancheng District, Foshan City, with a superior geographical location and convenient transportation. The offline store displays our full range of phone case products, covering various styles, materials and functional mobile phone protective accessories. Customers who are convenient for offline visit can come to the store to view the physical products, experience the hand feel, workmanship and appearance of different phone cases on site, and intuitively understand our product advantages and characteristics. Meanwhile, this official physical address is also our exclusive business registration and service address, applicable to official business docking, cooperative negotiation, formal letter delivery and other official scenarios, providing reliable offline entity guarantee for our store’s operation and service.

It should be emphasized again that Calstin has no other contact channels except the official business email and offline physical address. We do not have official customer service phone numbers, no official accounts or store accounts on any social platforms, and no other instant messaging customer service tools. Please all customers must identify our exclusive contact methods to avoid being deceived by fake customer service accounts and invalid contact channels, so as to protect your legitimate rights and interests. All valid consultation, feedback and cooperation information shall be subject to the content communicated through our official email and offline official address.

We have always taken "efficient response, professional service, sincere communication and reliable guarantee" as our contact service tenet. The 24-hour email receiving service and 2-hour fast response mechanism are our commitment to every customer. We respect every feedback and every question from users, and will continuously optimize our email response efficiency and service quality according to customer demands. Whether you have simple product consultation or complex after-sales and cooperation demands, we will provide you with standardized, professional and intimate whole-process services through our exclusive contact channel.

Thank you for your trust and support to Calstin. We look forward to communicating and serving you through our official email. We will always maintain an efficient and rigorous service attitude, respond to every customer’s needs in a timely manner, and bring you a reassuring and satisfying communication and shopping experience.