Give them about 8 weeks. If you haven't received the reward by then, drop RewardTV a note. They have always made good on any reward I've ordered, won, etc.
I just got my very first Reward TV award in the mail this weekend. I had ordered it at least 8 weeks ago and wasn't certain whether or not it would ever arrive. But it finally did. I wish that I had more time to earn some more points.