5 min champ selcet ban

i just got an afk for not afking at all... 2 other players did... i played jg.. the very next game i got a champ select ban while begining of game was loading and i nevr back out. What is the deal? Can someone remove this stuff so i dont hacve further issues. Considering the people that feed in this game that i keepp getting paired with on a regular basis, some the same players, some multiple games. and by feeding I mean running into towers and fighting 4 on 1 evry time riht outt of spawn. Yet i dont go afk and still get this bans and min suspensions.. I really dont get it. pls take this off my account