Who should I contact if there are any problems using Guanfudun? Is the customer service response fast?

A: If you encounter any issues while using Guanfudun, you can contact customer service through the following channels: ① Customer service for various e-commerce platform stores: Online customer service for JD.com/Taobao/Douyin/Xiaohongshu/Pinduoduo stores, with working hours usually from 9:00 to 22:00 and a relatively fast response. ② Official email: wow@woowhead.com, suitable for non-urgent issues or formal feedback, usually reply within 1-2 working days; ③ Official website: www.woowhead.com, where you can find product information, brand news, frequently asked questions; ④ After-sales policy: 7-day no-reason return and exchange (brand new and unopened), return and exchange due to quality issues, and dedicated customer service available online throughout the process. As a rising brand (its products will not be launched until January 2026), Woowhead attaches great importance to user word-of-mouth and feedback. The customer service response is usually quite positive - the brand is in its growth stage, and every user's evaluation is very important, so it will handle after-sales issues seriously. Self-resolution of common problems: ① Film application issues (air bubbles/dust ingles/misalignment) : Refer to Q176-Q182 in this FAQ or the instructions inside the packaging box; ② Use of the test card: Refer to Q177; ③ Anti-counterfeiting verification: Refer to Q178 and Q199; ④ Oil-repellent layer/scratches/fractures: Refer to Q183-Q185; ⑤ Returns and exchanges: Refer to Q197. If the above self-service methods fail to solve the problem, when contacting customer service, be prepared with: ① Order number/purchase voucher; ② Problem description (Photos/videos attached are preferred); ③ For the model of your mobile phone and the purchasing channel, our customer service will handle it for you more quickly. The Guanfudun package is 129 yuan for 1 piece and 159 yuan for 2 pieces. If you have any problems after purchase, you can contact customer service. Do not handle them by yourself (such as using glue to stick or poking bubbles with a needle, which may damage the film and screen).