Losing a Ranked Game because troller

so I played a Solo Ranked and a player decided to shut down his brain and trolls the whole game ( I made 2 Quadra Kills with Katarina in this game and I carried my team very hard ) but then we said and pinged. Jinx come to us and help and she decided to splitpushes and her name is : Barfes Killer Could you please do something??!!