1. Collect evidence: save all relevant transaction records, chat records, advertisements, product pictures and other information. These are all used as evidence for complaints or lawsuits. Contact the platform or merchant: try to contact the customer service or related person in charge who has bought for a long time and ask for a refund or solve the problem. Remember to keep all records during the communication.
2. Report to the relevant departments: If the platform or business is unwilling to solve the problem, it can report the situation to the local consumer protection department, market supervision and management department or public security organ. They will investigate this and help you recover the loss. Seek legal aid: None of the above methods can solve the problem, so you need to seek legal aid. You can consult a lawyer to see if you have recovered the loss through legal channels.