For example someone buys a physical prepaid wow timecard at best buy, pays for it with a credit card therefore activating the prepaid card and making it useable. 3 days after having used the code on the card to add game time the person cancels there credit card voiding the payment made for the prepaid card. After canceling the credit card will the gametime still be valid or would it have the possibility of being removed from the account it was applied to?