Find out what the equivalent of the Trading Standards Institute (UK) is in your country, and seek advice from them. I had the same problem with a purchase I made from what turned out to be a dodgy website, the guy deleted every trace he thought he'd left from his website's existence, but I had evidence of the transaction, which meant that I could have the transaction reversed, and my money back. This only works within a certain time bracket after the transaction, so I'd try that as soon as you can..
Find out what the equivalent of the Trading Standards Institute (UK) is in your country, and seek advice from them. I had the same problem with a purchase I made from what turned out to be a dodgy website, the guy deleted every trace he thought he'd left from his website's existence, but I had evidence of the transaction, which meant that I could have the transaction reversed, and my money back. This only works within a certain time bracket after the transaction, so I'd try that as soon as you can..