Can't upgrade the trial account.

Earlier today my mother and I were trying to upgrade this trial account with a credit card, but every time we were given an error. I think this is because the card is still linked to a hacked account that I haven't received a response from Blizz in days about. After I got the e-mail saying I would have an analysis from a specialist, I just got an e-mail saying items were restored on my main. No analysis given, and the account is still locked. So I pretty much gave up on that account and I'm trying to start fresh on a new realm, even though I wasted months on the old account and money on both expansions. -_-

I bought a 30-day code from the Blizzard Store, but whenever I try to upgrade online from the battle.net site, I get this message:
"You have entered a World of Warcraft� key that is currently not supported in Battle.net account management.
This type of key can be redeemed through the World of Warcraft� account management page."
When I click on the link provided, it says something invalid like "My hair is a bird."
I checked the status of the order and it said "queued". When I clicked the faq to read what the status meant, "queued" wasn't listed under the list of possible statuses of orders.

What does all this mean?
And should I give up on the old account?