Unsealed Lunatic

So I yesterday I did the Stamps.com TrialPay offer. I signed up, I made sure everything was in place, I even downloaded that stupid software. I come back today, and no reward. So I go to the TrialPay Customer Support to fill out a claim. I fill out the claim, but they are asking me for an order number. I looked around and can't find it. Can someone help me out?