File a charge back with your credit card provider / bank. It should be common knowledge to all credit card holders but, I have found that many people don't know about it.

You can file a charge back against any item on your statement. The bank will immediately return the money to you. No questions asked. They will then go back to the merchant to reclaim the money.

The merchant must then prove that the charges on your credit card were legitimate. The merchant does this by sending the bank any documents they have. The bank will send these back to you asking you to verify. If you verify that it is a legitimate transaction, you pay for it. Otherwise, you can continue with your dispute and will walk away with all your money back. The merchant will have to pay the bank back plus a penalty ($15-30).

I use my credit card more than any other payment method because I know that I can file a charge back on anything on my statement that I don't recognize.