Boosters will ruin this game

I have encountered in my last 20 some ranked matches one or two boosters. Currently I demoted two divisions (from gold 3 to gold 5) I am not the kind of person that complains or something but I`m truly upset that this kind of things occur. I ask you riot to try and solve this kind of things. I want to say that my high elo friends (diamond 1 +) complained abut those boosters. Thank you and every one that had the same problem as me lately back me up , because I am sick and !!!!