Can’t use online services/ can’t sync data to acc

Afternoon all I thought I’d come back to halo 5 and get back into things however for past few days every time I get the game booted up it says I can’t access online services and it won’t sync my data even though it comes up syncs and reaches 100%… at first I thought it was the disc so I got the digital version and tried again still the same results. Iv quit and re-opened numerous times hard reset my console deleted then reinstalled my live account deleted local data etc still no luck could anyone tell me a solution I’m dying to play again but having no joy whatsoever!