13-10-2019 8:15 PM
What @tressygirl and all the others say is - sadly - all too right and not "ridiculous". The problem is that eBay has no way to determine who is telling the truth or even what "the truth" may be. All are telling you what the practical effect is.
It is a sad fact that most people feel that the system is biased against sellers.
Part of the problem may be that as a private seller you are not required to accept "returns" for change of mind or "does not fit". The buyer may feel that there is no option but to open a "not as described case".
You do not have to do anything unless and until the buyer does open a "not as described" case. There is no other way. There is no obvious way for a buyer simply to report you to eBay.