It has my name and phone number on it. and my Powerup account number, no email.
That's different than my receipt. Mine does not have my name nor phone number but it does have my account number.
You do have a poweruprewards.com account set up for that account number right?
This is what is printed on my receipt for this DLC
XB3 Skyrim Dawnguard DLC SD6/2
Code Pending
Ref Id: XXXXXXX (<- real numbers there)
The authorization code for your DLC purchase will be delivered to your Powerup Rewards account on 6/26/2012. This date is subject to change. For the latest information on release dates, please check Downloads and Add-ons in your Powerup Rewards account. An email will be sent to XXXX@XXXXX.COM (<-my email address) with instructions once the authorization code is available