Account broke and banned.

Now a year ago I left the League of Legends game and now I wanted to re-open but when I entered the account I did not get in for so long I found out that my account was banalized and I did not I did not know anything about it, is there any possibility to unban my account for someone I think broke my account and sued as I saw it and for that it was banalized. (sorry for bad english) Thanks!
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