Ukna999

Hey 343, I was playing flood today on Halo 4 with two of my friends as guests and the game told me that I was banned from gaining xp I am not a hacker, but I was in first and some one was raging on me and I killed him twice (fairly) and that happened!! Microsoft support told me to come here and plead my case. Could you please tell me what I did? And if I was wrongly banned could you please fix it? Thank you, Ukna999 P.s how long does the ban last?