If the account has been payed with said creditcard, you're ok and not in trouble; just give them a call, they'll ask you to mail a copy of your credit card bill, you mail it, they fix it, done.

If you only payed using pre-paid cards it's a different story. You might wanna call them but they will need the secret question AND answer. If you don't know these ... You can't prove your the owner....

So I hope you did at least pay once with the creditcard


Mind you, Blizzard is ver nice and polite, or atleast they can be, so just give them a call and explain the situation.... Good luck!