HALO 5 problem

Ok so i bought the game a while ago and i’ve uninstalled it hard reset Xbox re downloaded profile waited like a month just been signed in to 1 account at a time and it just says it has a profile sync error and cant connect to the server i do play halo quite regularly halo wars ive played halo 3 combat evolved 4 reach even ODST and i really need to know what the problem is here. dont wanna be paying 40-50ish quid for this game and it is broke!

343! FIX MY GAME! i didnt pay for this game for you lot to waste my money.