1, directly contact Gu Jiajia's customer service: You can call Gu Jiajia's customer service number to reflect the problem to the customer service staff, who will record the complaint and reply as soon as possible.
2. Submit a complaint in Gu Jiajia's official website: Gu Jiajia provides a complaint channel in official website. You can log in to Gu Jiajia official website to find the complaint page and submit a complaint.