@tsarstepan,
Ebay was a friendly place. But thanks to the Myspace, Facebook, Instagram, and people who thinks that is all there is ... now we have these silent people.
Again do not converse with these people,
Just start the return, input as much evidence.
During that return process ebay will opt for you to attempt contacting the seller. If the seller did not contact you in time chances are they might be pulling something. A thing I hate on ebay is the amount of scum using Amazon gifts to send me an item they paid and they collect a little bit extra from ebay. I leave them all negatives.
.............
Then you have people like my father. They treat it like child-support, credit-cards, or a bill and "wait for the red-court-date letter and pay the lesser amount, only to get black-listed eventually. These are the people who are too lazy and think the world is going to give them politeness. You have to wake up and rise about that and realize that is not how it is. You have to be brutal.
I have had people do it to me on ebay as well. Provided evidence and return items to me. Even if that evidence was not accurate.
Point being you have your rights.
AKA "Item not delivered" or arrived.
Chances are some sellers will pull your leg and get money from you because of your politeness.