Very bad seller, a scammer. No communicatoin after sale.

This has been a very bad experience for me. I contacted the seller a week ago and he would reply yo my emails everyday about with information about the account and about using Selly.gg with Bitcoins. I eventually made the transaction yesterday and some account details were sent to me on completion.These account details do not work. Ok, I tried to contact the seller on email and on Skype. The seller has blocked me on skype - not even tried to chat to me about resolving this issue. I have given the seller a day because I think he is based in a different time zone to me but he has still not replied to my email or my questions via Selly. This seller has performed the worst possible crime in fraud, it just feels so bad. I will be contacting my bank this morning to see if I can recover what I paid.