This is not the first time this has happened. Complaints are useless. According to a previous report, the case was a Taobao seller who cancelled an order. In the end, this behavior was caused by a wrong operation. It is a sales error. The law allows such a situation to happen. As long as the situation is true, it can be solved by appropriate compensation. There are no detailed laws and regulations to restrict this. So it is recommended that the host calm down! Call Amazon to complain, and the result is that this is the final solution.