Getting ban for no reason

I really want to play Halo 5 but it seems I’m getting ban for no reason, it currently says fireteam unsuitable for playlist. I do nothing wrong and I really want to play halo 5 what do I do. Who do I contact. Please help.

When you try to go into matchmaking, it should tell you how long you have to wait until you can play again. You’ve only quit a total of 3 games since you have started, so I’m wondering if it’s banning you for something else, such as idling.

Where in matchmaking should I look, I didn’t Idle, I keep playing the whole time.