Priceline.com

Dear Sir, I received a priceline.com gas card in the mail. I was checking out their website, when I apparently gave them the right to withdraw money from my credit card. Since I was new to this website, I wasn't exactly sure how it worked. I have sent them 5 e-mails asking them to credit back my account, but they will not respond. Their only phone number is all voice mail. I am unable to contact anyone directly. They were so quick to take my money, but it is impossible to get anyone to rspond to me. I even called AOL, but they were unable to help me. I am just about ready to contact a lawyer, but someone told me about your website, so I thought I'd try you people first. Any help you could give me regarding this matter would be greatly appreciated. Thank you in advance :)