I reported the matter to my bank. The guy refuses to return the money... now I've received another message from the bank:
"Information regarding case 125878/102025
November 18, 2025
Dear Sir or Madam,
We have reported the matter to the payment organization. Unfortunately, this will extend the time we need to resolve your matter. As soon as we receive the information, we will respond to your request. We will do this by December 22, 2025 at the latest.
Sincerely,
Principal Specialist - Customer Operations"
In my opinion, this is a scam, and there's no point in speculating. A normal, honest seller would have returned the money and the matter would have been resolved.