Got Email, Activated Code, Didn't Work.

So I clicked the link, which gave me a code, I then redeemed the code.
I sign into my Xbox, still not showing I unlocked the Specializations.
I have tried signing in and out, restarted the Xbox…
I tried clicking the link again, but it says “This code has already been used.”

Is it: It just takes time and I’m being really impatient?
I’ve waited well over 5 minutes after I activated the code with my Email.

Any Advice?

Go to download history and redownload on your xbox.

Good thinking, trying that now.

Showed I haven’t Downloaded anything.

Went to Purchase History on Xbox.com,
found this: Specialization Priority Alpha 11/30/12
-That’s it.

But I clicked on it and it gave me this:
Ooops! What happened to this page?

We’ve moved some things around.

The page you are looking for may have a new location, or is no longer available. You might want to:

… Finding Alternatives.

check your active downloads, thats what i had to do. and then start your game up, and if it doesnt show up, dont worry, go to dasbhoard, restart game, it should be there then, thats exactly what i had to do.

There We Go,
I went to Xbox 360 Download Queue.
And found that: Specialization Priority Alpha is waiting to be downloaded…
As if I haven’t had enough waiting for the day…

Case might be closed.

Yea, made it appear in Active Downloads, said “Assigned to another Console,”
so I clicked it and Downloaded Now, seemed to fix it.

Case Closed.

Thanks for the Help,
If someone is having the same problem, just read this thread, should help.

I’m playing on my friend’s console currently, do you think if I download it on this one, that I will never be able to use it on my own console?
Edit: I had the same issues as OP, now I’m debating on what to do next.

just redownload under download history