This is in the wrong forum (book two hasn't been completed yet meaning you can't buy actually buy it yet), but don't worry it's not really a big deal (a mod will probably just move/lock the thread). If you can't buy it with the Wallie card you simply have to use another way to pay for it. Have you looked for help in the threads in the forum for book one? There might be some info of alternate ways of payment there.
That's all I can help you. Also, if your planning on staying here for other than seeking help with this it would be a good idea to introduce yourself on the newbie forum.
"It is neither good nor bad, but thinking makes it so."
William Shakespeare