Dishonesty. The things it received were not usable. He thought the seller sent the wrong product. The seller asked him for picture evidence. He has been dodging. And have keep talking about other things, but refuse to respond positively to the seller's request.And left negative feedback.

If you received the wrong product and you can prove the seller's fault with a photo and the seller just asked you for the photo, you should be eager to provide the photo, shouldn't you? Because this is an opportunity to show that you are telling the truth. And if seller not admit their mistake, you can use the photo evidence to Slap seller in the face. isn't it?
We can't think of any reason why honest people refuse to provide evidence. The only explanation is that they are dishonest.

Let's think. What kind of person would be afraid to provide the necessary photographic evidence? Obviously, those who actually made a mistake but refused to take on it ( yes, that is, cowards ) will be afraid. Because if they provide photos, it will be revealed that it is their own fault. So they chose to dodge. Not willing to provide evidence. Then use complaints and bad reviews to threaten sellers with refunds.