If the computer has been offline for a long time, perhaps try closing origin down completely and relaunching / relogging in.
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If it's still stuck in prcoessing:
Contact a Game Adviser
http://help.ea.com/en/contact-us/new/
They should be able to verify that your funds clear and unjam it.
They may also offer you to have it refunded and you can repurchase; at which point it would be activated at time of sale.
I would not want to wait for a solution past that if I was you. I would want to have it completed one of the two ways before I left a Game Adviser's chat/phone conversation. If they want you to wait an unknown amount of time to have it fixed, I personally would ask for a refund so I could repurchase it.
That was one of the first things I tryed, and it had no effect.
