Player who threatens about ban

Hi, one player name: ( smurfs are fake ) join in the lobby ban my champ than all the time in the game speak about ticket how Riot will ban my and all accaunt s in my team flame team all the time and spam chat, Riot need update system for players like these, can t belive what people have in leauge of legends after 5 year experience, this happend to someon else too ?