IDK WHY I GOT TEMPORARY BANNED

Hey, my question is why did i get the message temporary banned. i have been playing halo 4 as much as possible never boosted with friends and love the game(besides the xp cap). anyways, i play alot of flood and earn a lot of xp. im a 49 and almosted reached the 50 until the message appeared. I just recieved the message was i was trying to play and do homework. i got a couple of kills, and tried to finish my homework on the side. I went down stairs to talk to my mom, and when i came up there was that message. PLEASE RESPOND

What’s the gamer tag in question?