Permanently banned for Botting

I’ve Received a message from riot saying my account was banned for botting when I never used any third party program. Has anyone experienced the same thing? It just bothers me so much Because of the time and money I spent on it, and I got banned for something I absolutely did not do. I don’t know what to do now. I am so frustrated as people around me tell me Riot will not change their decision even when I have not done anything wrong. The worst thing is the mastery points I have on my main champ is now gone with all the skins I bought. I have supported this company to the point where I bought skins for champs I don’t even play just because I love their creativity.
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