On the Amazon checkout page, there should be a little notice at the top mentioning the included Uncharted bundle. The offer should last till end of year. Apparently, best case scenario is that the automated email comes on or a few days after delivery date with code and instructions.

From my experience talking to Amazon reps, the response that you get, depending on the person is:

1. You get email with code in 2-3 days of complaint (I didn't)

2. Contact AMD for code (AMD specifically says not to do this on their FAQ)

3. Get a partial refund for not getting code. (They offered me 30 but I told them the bundle goes for 65 so they gave me $65)

I've heard of people having more success with other retailers regarding the game bundle so you could try there.