How To Appeal a 14 Day Suspension

I got banned for 14 days in a game where I hardly said anything all game until Graves stole my penta, but we won the game, how can I get banned for basically saying nothing all game until he stole my penta

Here is my chat log from the game that I got banned off:

Game 1 RKT Rekt: drake? RKT Rekt: when I come back RKT Rekt: STOP FEEDING RKT Rekt: wtf RKT Rekt: Graves RKT Rekt: you %%%% RKT Rekt: You %%%% garves

See? Basically nothing said, carried my team and won the game while Graves was constantly trying to surr and flame.