This situation happens a lot, everyone should work together and report the problem to Taobao.

Don't let the scumbags of Taobao run rampant. You can post repeatedly in forums or gangs. Everyone will help you. In addition, he didn't pay, you don't have to care about this garbage, your store's inventory is probably less than the quantity he ordered, and if you don't have the goods when placing an order, it's just a waste. If you don't have the goods after placing an order and paying, his complaint against you is valid. It's useless if you have the goods in the physical store, you have to look at the online store.