Ovallers

I live in New Jersey USA and my rank is only a 51. I can't even get war zone matches.. I know it's not my rank or connections because when i search with friends, I have this problem but as soon as I leave their fire team, they can join the playlist we were searching in. It's every playlist including war zone.. All I can do is play customs with them . Mind you, they are higher rank than me I have had the game since day one and never had an issue until a week ago.. Also not sure if this matters but this all started happening when I played against some guy and he got mad team won. He sent 27 invites to all of us.. It was like a bomb of invites.. Could it have been like a virus or something ?? After that game, I started having issues.

For the last week I have been unable to play matchmaking. I can play custom games and talk to friends online but when I try to search a match, it says "unable to match, not enough people or skill level too high" it says that for every playlist. When I join a fire team, we can't finds matches because of me. When I leave my friends are able to find matches instantly. I called Xbox twice and I have deleted my xbox, deleted profile, reinstalled halo, hard reboot, unplugged router and modem.. I have tried everything. My NAT is open and I know it's not my connection because I can play custom games and talk to people. Does anyone have this problem? Please help. Thanks!!