Got ban for no reason

Games Other Halo
1

While I was playing on live i suddenly got the message that i can no longer gain experience because I got ban

"If you’ve been banned, it may be for one of the following reasons:
Manipulating network conditions to your own advantage, or to the detriment of the experience for other players.

Modifying your Xbox 360 hardware or game software and services in any way.

Skill, EXP, or Credit Boosting, de-leveling, idling through games, cheating, habitual quitting or any other type of unsociable and unsportsmanlike behavior."

I did not do neither of these reasons.

Can anyone help me out ?

2

I count seven games today on your Waypoint stats where you are in last place, no score, and no DNF on them.

And this.

3

Like the other guy said, you’ve been idling(AFKing) in games. That is against the rules.