I bought and redeemed a pre-paid ESO monthly subscription on the day of the release. I immediately received the associated crowns, but as of yet, have not received any of the in-game boosts. I've already contacted Zenimax support several times, as well as GameStop, where I bought the code, and have been directed here.
Also, my friend, JOHNNY N0BODY, is experiencing the same problem, having bought and redeemed a similar code at the same time.
Thanks for your time.