Unable to join Halo 5 Gaurdians Lobby Service

Ever since the NXoE dashboard came out I haven’t been able to connect to arena or warzone.

I have unistalled the game and installed it numerous times, reset my xbox to factory settings and nothing has happened.
Microsoft haven’t been much help either, everything they suggest has failed.
I was on a digital copy which I got a refund for before buying a physical disc copy and still I can’t connect to arena/warzone.
Anybody know of any solutions that could help me out would be appreciated.