Banned for being booted offline :(

I was threatened by one of my friends, friends who said he would kick me out of every game i played online to make me lost me highest skill every time i got in a game it said everyone quit and i don’t know what happened I’d never go up or down either. i eventually just sat in lobby and went to get some food i came back and i had a pop up saying i was banned for one week why did i get banned? like did it count as me quitting or something?