HELP WITH SPECLALIZATIONS

I have being playing halo 4 sence it came out, im a SR 70 and i can’t chose a new specialization, i got wetwork and operator. i heard you are suppose to get a email with the codes, i didn’t get anything, if you could help,that would be good,thanks.

Two new specializations will be released on Monday. They will be released on a weekly basis now, the dates are listed below.

> Week of 1/21
> Pioneer and Pathfinder Specializations unlocked for all players.
>
> Week of 1/28
> Engineer and Stalker Specializations unlocked for all players.
>
> Week of 2/4
> Rogue and Tracker Specializations unlocked for all players.