#1 - July 27, 2009, 6:35 p.m.
I'm sorry to hear that you’re having trouble upgrading your trial account, Obiturary. As prepaid credit cards are not a supported form of payment, our verification procedures often encounter an issue when attempting to process them. If you would still like to use your prepaid credit card with us in the future, it may be best to contact the Billing department by phone to see if we can attempt the upgrade for you.
Alternately, you are welcome to purchase a retail copy of the World of Warcraft, and use the authentication key it comes with to upgrade your trial account. I hope this issue has not caused you too much inconvenience, and please let me know if I may be of any further help.