You should have recieved it. Most people got it about a week and half ago. Go ahead and call admissions. Look for your regional officer, it'll save the hassle of being transferred.
Now for my two cents, and take it for exactly what it's worth. Unless you put down that you've failed every class you've taken and got a 600 on the SAT, I really can't see any reason why they wouldn't give you a candidate number. So don't worry about not making it to the next step. The line in the NASS rejection letter "you are deemed competitive enough for admissions" or however it is phrased is just a moral boost. I honestly, believe everyone gets atleast the candidate number, as this atleast boosts the academy's numbers (shows a lower acceptance rate). I was rejected from NASS as well, so I'm not being arrogant or condesending. I maybe wrong, and someone maybe able to give me an example, but thats just my opinion. If I'm wrong, I'm wrong...I take no offense.