You can return this if you like. It is clearly stipulated that merchants must return the goods within one week. You can ask him to return it. You can go online to see the "three guarantees policy" of the merchants. This is not the self-discipline behavior of merchants now, but it has been clearly stipulated. If you don't return it, complain to the Consumers Association or the shopping mall management office. In short, if you are not afraid of trouble, you will be able to pay it back. Of course, the premise is that you can't break it for others.