Personally, I keep my physical copy if I get a digital version. Besides the simple, physical aspect of it, you would still be able to play it if something happened to your account and it allows you to easily double-box if you needed to grind out some multiplayer achievements.
if you prefer the physical game over the digital you can always call them up and see if they will exchange the digital rare replay for a different game
They won't ever do that. It was a free promotional item. All complaining will do is get a person is a refund of $0.00.