Why I got banned?

My acc got banned because of this. IDK why. that was my friend not me but where did you see reason to ban my acc? this is what he wrote in chat. he was playing with his mates:

Game 1 RetardedKid4: safe cotne shacoa RetardedKid4: why no follow? RetardedKid4: u could kill him noob RetardedKid4: ok then i will farm too cait RetardedKid4: stfu and farm RetardedKid4: stfu and farm RetardedKid4: no i wont cuz u r bad dude :D RetardedKid4: u were rude to me RetardedKid4: so enjoy RetardedKid4: ok enjoy ur game then :D RetardedKid4: i care? RetardedKid4: kill this toxic cait wont help RetardedKid4: RIP RetardedKid4: rep toxic cait for flame and now troll RetardedKid4: yle xar rogor gageqcnen bliad 1v 2 ze ramis movkali da 5 % ianebi gageqcnen RetardedKid4: damm annie :D RetardedKid4: i can 1 v 1 jinx :D RetardedKid4: kinda easy RetardedKid4: sad i dont have adc RetardedKid4: shh toxic kiddo RetardedKid4: 0/4 :DDDDDDDDDD RetardedKid4: 100 minioni adcze? :D RetardedKid4: yo i had no adc mid lose u wake up RetardedKid4: u start when i asked why stay farm u said stfu and poke RetardedKid4: so u start flaming me ;) RetardedKid4: u said "stfu and poke thats ur job " RetardedKid4: so better learn to farm and play look ur farm and kda :D RetardedKid4: he left bot so ofc i took farm RetardedKid4: cotne rasaketeb kacurad botze teamfight ro midis? RetardedKid4: 1 v 5 ginda mogeba da teamfight rocaa botze zixar RetardedKid4: yleebi bijo :D RetardedKid4: yleebi :D RetardedKid4: unda vchamo RetardedKid4: thats what happen when u flame from start cait ;0 RetardedKid4: sure RetardedKid4: stfu and poke them " surre RetardedKid4: rep cait Game 2 RetardedKid4: np RetardedKid4: srry RetardedKid4: yle xar roshek ra RetardedKid4: bait ro giketebda vermixvdi? RetardedKid4: camille first time? RetardedKid4: then stop feeding RetardedKid4: camile go afk plz RetardedKid4: no u suck RetardedKid4: 1/5 stop feeding RetardedKid4: 1/5 sure RetardedKid4: rep camile RetardedKid4: always dumb team RetardedKid4: roshek ult? RetardedKid4: ar gaqvs? RetardedKid4: ha? RetardedKid4: ar gaqvs bijo ult? RetardedKid4: aeeeeeeeeeee RetardedKid4: yleooooooooooo RetardedKid4: afk RetardedKid4: gg wp report mid and top RetardedKid4: wont waste time here :D RetardedKid4: uyr lux play way better then our retarded mid and top RetardedKid4: NO RetardedKid4: dont care RetardedKid4: khalista let me die RetardedKid4: didnot used ult so dont really carer RetardedKid4: no farming jungle RetardedKid4: wont waste time for bronzies :D RetardedKid4: 5/13 yasuo wants to win RetardedKid4: stfu and learnt o play RetardedKid4: yo RetardedKid4: rep top and mid RetardedKid4: finish already :D RetardedKid4: dont waste my time here :D RetardedKid4: roshek awi gaigvidzeb da gaaketeb ults