How to deal with a buyer who only refunds the order and leaves a negative review?

admin

I encountered a really annoying case. After I refused the refund, they immediately returned it to them. This is really embarrassing for me. He even gave a bad review after receiving the refund and continued using the item (account). I intentionally didn't return the items so that I could see how despicable this person is. Now I have his phone number, WeChat ID, QQ ID, and I can see what kind of person he is from his signature on the profile. How do I get rid of him?