Amazon really needs to revamp this product key system I think.
Again dude, so sorry for the hassle, to address this directly, it'll be 6 weeks or less and we should have a long term solution in place.
Please reference this note, which is on all of our Digital Video Games pages when contacting CS, it will help.
Some customers are experiencing difficulties viewing their product keys in Your Games & Software Library. If you are not able to see your keys, we recommend navigating to a different page and then going back to Your Games & Software Library. We are working to resolve this as fast as possible. We apologize for any inconvenience.