File a chargeback dispute with your bank immediately. You are guaranteed your money back and since he hasn't responded he is unlikely to fight it and he is in

File a chargeback dispute with your bank immediately. You are guaranteed your money back and since he hasn't responded he is unlikely to fight it and he is in the wrong. As long as you have the documentation attempting to contact him and he said nothing + this is within the 14 days EU’s Consumer Rights Directive, he must give your money back.