Hello, tabitha1226.
Thank you for visiting Apple Support Communities.
Since the redemption code was successfully redeemed, I would check to see if you can download the movie from your past purchases.
Download past purchases
http://support.apple.com/kb/ht2519
If you are still having trouble with this movie, here are some additional resources I would recommend.
If your Digital Copy DVD or Blu-ray is damaged, scratched, or missing its redemption code or Digital Copy disc, contact the appropriate studio for help:
Lions Gate
If you're having trouble redeeming your Digital Copy code or downloading your iTunes Digital Copy, contact iTunes Store Support.
Cheers,
Jason H.