Was sent an already redeemed code for the game by EA.

Hello estroj3nn​ ,

Sometimes it can be tricky on Xbox to find the game when you redeem its code.

You might want to go to your full library and use the filter "Sort by date acquired".

If that didn't do the trick, you will need to reach out to the email who sent you the code as we are not able to provide replacement code on the forums.