Map packs don't work

I just downloaded the noble map pack and the defiant map pack and when i play them it says i dont have them. i have also redownloaded them many times

Have you tried clearing your system cache? Sometimes that gets rid of some weird issues.
http://support.xbox.com/en-US/xbox-360/settings-and-initial-setup/clear-system-cache

Doesn’t even matter 343 made it impossible to play the DLC in MM anyways.

Yea, I have tried clearing my system cache multiple times and it still doesn’t work. And I would still like to have them because i paid for both of them.