Need help now plzzzzz

2 weeks i stary a game and in thr midle of it i get kicked out it says your fire team hase changed i cant play im banned over 1hour now and theres now way to contact any support

There is an official ban thread pinned in the support forum. You should use that thread for all questions and discussions about being banned:
https://www.halowaypoint.com/en-us/forums/e0d9938206f04a598ce84f2c8cadce02/topics/the-official-halo-5-why-was-i-banned-thread/19fa6556-e0b1-4248-b817-b3a99d0af5bf/posts