I know this falls on deaf ears....
The ones who need this, wont accept it. Those who accept it, don't need it.
BUT if you are going to make a complaint of being falsely banned due to chat/toxicity you need to be posting your chat logs so we can tell you what you said that was wrong or to see if you truly were falsely banned. You get an email with a copy of recent games to show examples of your behavior, double check your spam folder if you dont see it right away or check with Riot Support to get a new copy.