my halo 4 profile will not connect to servers

My halo 4 profile will not connect to servers. My sons profile works fine but mine says servers not available and not working on waypoint. Now been over 24hrs can someone help with this as its starting to make me very angry. I have paid £70 for limited edition and have had sparten ops and multiplayer taken away. This is the 1st game i have ever had problems with and i play a lot of games including all the halo games. Can somebody please explain to me why my profile will not connect as i only have campaign available.