Got 14 days ban, because other guy was trolling.

So today I was playing soloq, got into champ select and there was one guy who said will troll. We went into the game and he started to troll. After game ended (ofc we lost) i reported him, went to another game and saw that my account is banned for 14days. I don't know what is wrong with these things but it is not fair to ban players who are not doing anything, like for real, that guy who trolled will troll more and now I will sit with 14 days ban for now reason?
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