pm flaming

so i was in a game where i flamed but most of the cursing i did was at myself cus i messed up or something. then the adc started telling everyone to report me for flaming even though i stopped after like two sentences of flaming (which i accept if i get chat restricted for that) but also the guy kept telling everyone to report me and how i was gonna get banned for cursing and flaming. so after the game i added him and said i was sorry for flaming cus thats what i usually do when i feed alot and have a terrible game and get in an argument with someone (i didnt feed this game we actually won) and then he started saying a ton of curses which half way through i turned off the language filter cus i hadnt been on that account in a long time so most of the first ones are "****" so basically this guy is a huge jerk how do i report him out of game. i still have the chat up with all the things he said and i screenshotted it