Didn't Get the Graveyard
Contact EA. They'll tell you to restart your device, re-install your game, etc., but they should be able to give you the prize since they'll be able to tell that you've earned it.
Forum Discussion
If you're in North America, the best option is the call-back option. They've always called me in a relatively short time (anywhere from a few minutes to an hour at Christmas time) and the results are basically instant - no back-and-forth with emails and it's easier to explain the issue when you're actually talking to a human being.
