You've been scammed. As much as you don't want to do it, your only safe bet is to close the credit card. You have to file fraudulent charges with your credit card company. Their fraudulent dept. should reverse the charges. Leave that card open, just watch them suck it dry..they could care less if you were living on the streets.
Watch the video on this website at the top right corner. You'll see who you're dealing with.
Most Credit Card Companies and Banks are aware of the Scam and have reversed charges.
It's your money. Close the card and start another account.