How can idle fish buyers avoid the habit of malicious refund?

Where can I return the goods? This is a hand knife, and the idle fish officially supports the seller. The round-trip freight is paid by the buyer. When the buyer returns the goods, if he chooses to pay the postage without your consent, you can refuse, so that the buyer will pay the freight for the return of 2-/kloc-0. After the goods are returned, if you pay the freight, you can intervene in Xiaoer after receiving the returned mobile phone and apply for postage when sending it, and the idle fish will support you. At that time, the buyer will directly lose 30 freight and can't get the mobile phone. When receiving and returning goods, you must take a video to disassemble the courier, and you must disassemble it into a courier. Refuse you if you have any questions. At this point, you have video evidence to prevent the buyer from changing the bag.