Sven

If dealer is being a problem and you bought on a card then insist on a charge back - maintain that it is a fraudulent transaction (it is), you don't have to explain why to the bank, just insist it's fraudulent. They HAVE to refund you. They may reverse it if challenged by the dealer but will reverse to you again on request, dealer would have to go to court to get it - and would fail if they breached trading regulations.