Waypoint Completion not showing up

Hey. My completed missions don’t show up on Halo Waypoint, I can no longer get achievements, my scores dont save, it’s as if my game has completely de-synced with Xbox Live minus me being able to play on matchmaking. I tried working things out on a different account and I’m still able to get achievements there, so it has to be exclusively my account. What do I do?

Two days and not a single response? Really?