Permanently banned for "Botting".

I was banned last night for "Botting". I am a level 29 and almost never have more kills than deaths and play the same three champions most of the time. I leveled to 28 two years ago. I took 2017 off and most of 2018 because of a health issue. The only flag that I can see is that I'm not playing well for a 29. Before the game I played that led to my ban, one of my teammates called me a ***** before the game started. I probably wasn't playing up to his of her standards. Looks like I'm not playing up to Riot's standards as well. I have appealed my ban but it looks like they are almost never reversed. I wouldn't know how to use Bots. Heck, I'm 70 years old. I'm happy I can still play online games. I guess the thing that really hurts is that someone or some computer thinks I'm a cheater.