Ban Appeal

A few years ago I was permanently banned, I was under a lot of stress at that time and I was indeed very toxic and offensive to other players. Without going into personal matters, and even tho I feel the ban was fair a few years have passed and I have a desire to come back to this game. I honestly belive that after a few years I have "Done my time" and I would be most glad if I could come back to this game. Is there any way I can appeal my ban and return to League of Legends? Thank you very much!
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