Bot Banning?

I got perma-banned for botting in a League game and I have no idea how. I have never used a bot and don't even know how to install them especially since I play on a Mac laptop. This is the second time my account has been wrongfully banned and Riot already had to unban me a month ago when they realized their systems were wrong about the Incident. How do I get in contact with someone from Riot because their systems obviously can't detect these things correctly.
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