I bought the wireless adapter from Amazon while the fallout vr offer was advertized. After receiving it and signing up for viveport using the included 2-month subscription, I too have yet to receive the game. My redeem page is blank (just asks me to enter a code).
I found this thread back then and figured I'd wait it out, since it was said it could take up to a week for the code to arrive.
For me, it's now been 10 days and no code... Did I mess something up or do I have to just wait longer?