Banned Again

I was banned from halo 5 arena for 6 hrs the first time, without any notice. I took this on the chin as I had quit out a few matches, I decided to finish every game I started so this did not happen again, today I received a 24hr ban for idling. I seem to have a couple of dnf’s recently that I know nothing about, wtf can someone explain what I am doing wrong.

The only reason I bought the xbox 1 was for this game without it I think I will try the playstation.

Sort it out.

I have the same problem!!
I finished a custom game with a friend(we completed the game), and right after I tried to access arena,I couldn’t play a game because I got banned for almost 5 hours with no reason. This has happened before a couple of times!
Fix this!