Well guess what if its not in your order history and TGC are saying you haven't bought it none of us will give it to you. Do not get mad at TGC they do not make mistakes like this i suggest you contact support and send them your order code and Date of Purchase as well as the licence key and anything you think may help i.e Email address you bought with and get them to check it for you.
And it wont be in your other accounts as you didnt buy it with those accounts. Why have you got more than one account anyway its not allowed and just makes everything so confusing.
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Windows 7, Intel Core 2 Duo 3.2 Ghz, 4GB, 2x Nvidia 9600GT 1GB