Halo 3 single and multiplayer not working

It is more than a week right now, and halo 3 is not working. When i turnned on my xbox i see that was downloading a new patch and i think they fix this problem, buuuttt noooo. Even the campaing is not functional.

No i dont want to change my console region, i want 343 to fix it i paid for this game, not for an early acces.

Are you on the preview program for Xbox? Some gamers are having a problem with matchmaking due to miracast app.
Is it crashing or just not loading?

When I try and play any campaign mission it won’t load. Everything else works fine… I saw there was a new patch but wasn’t prompted to download it

Go to settings and verify your region US or UK. Click on reset and then hard reboot your xbox (hold down on the power button). This should help clear up any issues.

My H3 campaign isn’t working either, kind of disappointing, the campaign is a big deal to me.