How to deal with toxic players in champ select

i recently got into a champ select where everyone was toxic because i used my ban to ban vayne because i dont want vayne on my team. next everyone start trolling right away and told everyone to report me. what im i suppose to do? i already have ptsd about vayne players on my team so i will ban it every time there is a vayne player on my team. im no -10lp because of toxic players what im i suppose to do?