If you don't get a reply after a few days, just try again. Just be polite, keep it short and provide as many details as possible. Besides CD-key (incl. a photo copy of the gae card and box), you might also provide what you believe is the last purchase(s) you did in Ingame Store and last 4 digits of your credit card that you used. I've been asked for this before so I know it can be of relevance in proving it's your account.
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