Your terms of service or condition does not sheild you from false advertisement or false accusations. I advise everyone to keep track of their credit or debit transactions. Unless it's proved that you in fact hacked or manipulated their system to gain an advantage then what you purchased can not be confiscated. This is not a Bank error, you in fact saw an advertisement and made a purchase. You are not held liable for their errors. You can make the case that it's the only reason you completed the transaction. BBB is the Better Business Bureau. This will in fact be a class action suit if they tamper with a final sale, which is against the law. Refer to the SEC(Security Exchange Commission). Gree its your error and you have to pay for it. Your Terms Of Service doesn't apply in this case.