I have been Permabanned without being reported

So there's no chat logs of what I did, I haven't played League in literal years at this point. I decide to come back to the game, I did the password recovery & everything to get access back to my account. I download the game, I update everything, I have my new password & old username I go to sign in. I get "Account Suspended" This account has been suspended permanently. I go to the link, I click on the Chat Logs option to see "Maybe someone else was using my account, they were flaming, it'll at least give me an idea of what happened!" "Players have reported you 0 times in the past 20 games for negative or abusive behaviors in chat. Here are some chat logs from games where you were heavily reported:" Just a vacant space, there's no message on what I did, no message about my actions, I've NEVER been banned or suspended before playing, I don't even talk in chat 90% of the time because I use discord. Can anyone help me out with this?
Reportar como:
Ofensivo Spam Mau comportamento Fórum incorreto