Halo 5 Multiplayer Error Unsolvable HELP!

Hey, Halo community members, I have a problem with my game. I can’t play multiplayer online because it says: “:Error authorizing user with Halo 5:Guardians services”
I have tried the following techniques:
-Cleared Blu-Ray persistent storage data
-Cleared alternate mac address
-Restart console
-Reinstalled the game
-All possible troubleshooting
-Verified Microsoft account
-Contacted Xbox support (which gave me no solution whatsoever)
These techniques have not worked for me, if anyone knows a fix please help me, I am very upset about this issue and this has made my Halo 5:Guardians experience worse than it already was… Please help, I hope 343 find a fix, if not I’m going to freaking Gamestop and going to get my REFUND!