Repeal a ban

I was perma banned for talking trash to other teammates. While my acts are not justifiable and wrong, I don't understand why I am receiving a punishment and they get off scot free. Not only were two other players talking trash to me in my final game before I got banned. I know i need to control my anger and I had all chat muted to avoid that, and I probably should have muted team chat too to avoid tilting so hard. I don't expect a repeal by any means, but if there's a chance for me to demonstrate one more time i can change then I would like to take that opportunity. If there is a way for me to get unpermad ill do anything I can to do so. Apologies for not being smarter with my words.