Possible instant feedback bug

Hello, I already posted somthing similar to player behavior forum but i am posting this here as well because it's possibly a bug. I basically got into a game with a premade team (I was not in the premade). I was mid agasint a kat as ekko and as we were playing i asked for a gank. my aatrox literally didn't do anything but i was like ok. I died as i got pressured and went back to lane. asked for a gank again and he still didnt do anything. Me and kat fought under my tower and she barely lived. Now aatrox wanted to do something and tried to get her. He failed then started to push my lane but not further engough to go into tower. I was like wtf, wut r u doing. thats trash. don't come to my lane only when im not there to only steal cs and push. he told me to stop feeding and as thier renekton out of nowhere called me trash, garbo etc. Realizing how this game was going to turn out as i was the only person negative i was like f off or ill leave i don't want to deal with ur shit today. they and blitz spammed k and i left. After a few mins later i realized that was a heat of the moment decision and i recently left a game due to an actual real life event recently and i probably will get low prioirty if i stay afk. So I went back in and they basically all told me to leave. somehow aatrox died 3 times within that short period of time and I was like stop feeding aatrox. I then went back to playing and ingored everyone and responding to insults with a tradional goodfellas qoute tommy used to spam. Basically the game was going and i wound up being postive and our aatrox died 9 times. guess this dude got pissed and was like 1 v 1 me. I said no i got better things to do, i gotta finish my rank promo. Basically got taunted by the rest of the team and premade into doing the 1 v 1 which i proceeded to win. Shortly after I got a 2 week ban ntoficiation over this one game. I'm, not a expert but after some research i found it should be Chat restrictions, low priority queue, 3 day ban, 14 day ban then perma ban. I have gotten low priority q from leaver buster before, can't remeber if i ever had chat restrictions and im not sure what that even means. But I do know i never had a 3 day ban before. This is all based on one game too. I'm pretty sure this is a instant feedback bug because it skipped like 9 steps. Also I was still able to log in and play games that weren't saved on the match history like bots and turtials. This occured when I launched the legacy client. One the new client I was told to report this to riot.

TDLR; I was toxic and got in trouble for it in one game. Over-punishment because of first incident in the recent memory. I dunno if riot ifeedback system is buggy and I am still able to log in and play turtials and buy stuff from shop and change my icon etc.