As I enter the homepage of the game it come up with a message that I am unable to access online modes and all my data from the game is gone. Apparently it is something to do when 343 got hacked
Try clearing your console’s cache. You can do this by power cycling the console (google for instructions).
If that doesn’t work, try removing your profile and redownloading it to your console (again, use google for instructions).
If that doesn’t work either, try reinstalling the whole game.
Mines been like that for 4 weeks now and I’ve done everything. If you do fix it please let me know because I’m getting annoyed at 343.