Be very careful with this buyer,he Play a little trick to take advantage of seller.
At first he would claim item has problem, you offer him the first solution, he will use Blurred expression to say not agree （the meaning looks like he is very unhappy with your first solution，but he never directly say “I don't agree”,we think he did that deliberately as a trick）

So you offer him the second solution，when he received your second solution，he will reply the old message that you send him the first solution says "Fine"or "Agree". According to the time,you would think he is accept your second solution, so you do as your second solution said.

Then he will come back and says you did not agree with that solution, and you are take advantage of him, he will said he is actually agree with the first solution. After that he will open case to get all his money back and hurt your business.

When you dealing with this buyer, you need to make double confirm with him until you get clear reply before you do something ,make sure there has no mistake during communications. It is better to block him directly so you won't waste your time talk to him.

We lost our money because of carelessness that caused us to fall into his trap