First off, sorry if this is in the wrong section!
I was using the trial account, then I bought the disks from amazon, and installed the game through them. When I try to upgrade using a game card I bought, I get this error when I type in the code:
You cannot claim this game card key. You have no eligible World of Warcraft accounts for this game card key.
I looked up the issue, and apparently I need to buy an additional upgrade before I can use my card, but other sites are saying that when you install the game with the disks, you can use a code which will upgrade it, without the additional cost (Since I spent thirty pounds on the thing) However, the only code that came with my disks is the one that allows you to give a friend a free trial.
Is there a code I'm missing? Surely I shouldn't need to pay an additional fee AFTER purchasing both the game and game card?