Get these players out of my games.

I'm beyond pissed at the moment. I am so done with this game. Every time I get to promos I get a troll or a feeder. Every godamn time. I have reached my breaking point. Today I had a game where our jungler (kayn) intentionally threw the game by refusing to group and afk farming top all game because we "stole his kill". As a result of this, the enemy jungler recieved every single buff and both barons, because kayn refused to do anything. I attempted being kind to him and asking very nicely for him to help us out. To give you guys a clear idea of how ahead I was, I was an 18/4 swain with 4 items at 25 minutes. Literally all this dude had to do was click a summoner spell on his keyboard for us to win. Alas, we ended up not closing the game out because we were fighting 4 vs 5s and they had a cho'gath with 11+ stacks as well as a draven with 9 kills. We were clearly winning the game and could have ended on multiple occasions, but this kayn decided that he "didn't want us to win" for some childish reason. I sincerely hope this player recieves a ban. If I do not get an instant feedback report, I will be utterly pissed off, because I have spent weeks trying to get to my silver II promos. I need to know that riot will do something about these players. Frankly I don't care if you guys think I'm making this up or exaggerating because I know and the 3 other players on my team agree that he was blatantly throwing. Anyway thanks, have a nice day

Edit: Not sure why I'm getting downvoted. If someone can explain to me how this isn't throwing I'd be interested to hear.