Account permantly banned

Hey guys ( riot , I'm really shocked im permantly banned from league of legends, The reason cause of negative and flame i understand i was awfull i agree. But if i knew i would get a ban i would never do that. Is there maybe a chance i can proof myself or get my account back for some reasons I really put much money in the game and energy i was almost diamond :( Please help me someone for advice. Greetings.
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