Solo Game Doesn't Load

Is anyone else having issues with the game not loading any parts of the solo campaign. I am playing Halo 4 and I am at the Reclaimer level where you are just about to get off the Mammoth and when I get to that part of the map, the environment doesn’t load. In fact, if I wait long enough, the Mammoth disappears and if i move to where I would be off of it I just die. Microsoft told me to get in contact with 343 Industries but this is the only way I found how to. Anyone else have any ideas how to fix or how to get my game disc swapped?

Sounds like they’re giving you the run around.