I’ve been having issues with the MCC for months now.
And lately my achievements don’t show anymore. Nor does the Player ID nameplate section load every time I try to open it. If it does open the nameplates, it doesn’t unlock some of the ones I’ve completed.
My Xbox One says I have 117/0 achievements for the MCC. The game itself says that I have 0% progress in the game (but it used to show 22%) despite having finished all games on Heroic and having started Halo 4 on Legendary (among many things I have done in the game).
The game does remember what I’ve completed in the “Save” section (for example, I did two Halo 4 missions on Legendary and beaten the par score on Dawn and the game does show that and it gave me the achievement for the par score).
Also, in Score Attack it sometimes shows 0 points for kills of multi-kills, like it’s not connected to the servers.
I have contacted Xbox support about the matter and we have tried numerous steps to resolve it.
Here they are in chronological order:
1.Uninstalled the game, logged out of my Xbox, power cycled the console and reinstalled the game (Yes, downloading 68 gigs all over again, yaay)
2. A factory reset of the console with retaining game and app data. So just the OS reset. Logged back in, started the game and that was the first time I saw the “Synching data for Halo: The Master Chief Collection” message in like 5 months. It got up to 45% sync and just froze for 10 seconds, then opened the game menu like business as usual. The problems were still there.
3. I came up with the bright idea of deleting my saved game data from the console, because all of the saves are actually kept in the Xbox cloud anyway. It did force a resync again, but it got up to 45% again and just started the game in its broken state.
4. I did the “Delete saved game data” process a few times and came to the conclusion that the Cloud data is corrupt.
I have had numerous talks and troubleshooting sessions with a plethora of Xbox support employees, yet the problem still persists.
I have asked them to delete or reset my MCC saved game progress on the cloud and have confirmed (multiple times) that I am more than happy to replay and re-earn all my progress all over again, as long as the game works properly.
The best solution they could offer me is to contact 343 Support directly.
Now, please, you guys tell me how do I do that?

