Can i please get some help to tell me why i was banned

This was about a week ago when i was having a bad rengar game and just not really having fun so i just decided to troll in chat a little( i kept saying ren carry as a joke because i wasnt doing all to well) but i was just pretty much joking around and got banned because of it and i still dont really know why. and here is the chat log Game 1 Bangbusdriver: ths Bangbusdriver: wow your so cool Bangbusdriver: %%%got Bangbusdriver: no ganks for you Bangbusdriver: stfu Bangbusdriver: i dont play rengar and he sucks rn Bangbusdriver: fuck you Bangbusdriver: twitch bot Bangbusdriver: thxs Bangbusdriver: gaty Bangbusdriver: %%%s Bangbusdriver: %%%s Bangbusdriver: thxs Bangbusdriver: naw Bangbusdriver: actually ren carry Bangbusdriver: ren carry Bangbusdriver: ren carry Bangbusdriver: ren carry Bangbusdriver: twitch you suck Bangbusdriver: bad jg Bangbusdriver: rengar carry Bangbusdriver: trist i one sahot you Bangbusdriver: 2 ez