I got permanently banned after this game.

So i am a silver 1 player and got autofilled adc role when i put top and mid(not a problem),but my support got autofilled and he picked XIN ZHAO(no problem i didnt flame him)but then he started stealing my farm,called me a polish scum,AND I GOT BANNED!!!!!!! HE HAD MORE FARM THAN ME AT THE END OF THE GAME IN LANE HE HAD 40 AND I HAD 20??? WHY DID I GET BANNED??? WHAT FOR??? JUST WATCH THE VIDEO PLEASE,also he banned vayne intentionally when i hovered over her in lobby to pick her. https://imgur.com/a/SXhKy check the pics,i didnt call him names he called me names i only indirectively talked about him if that is considered flame idk I CALLED HIM a RETARD ONCE,ONE TIME!!!!!,also i spammed AFK,and report becaause he did that to me when i didnt follow him into a 5v2 fight. https://imgur.com/a/SXhKy Check the chat logs from him and the enemy team.