My account permanent banned

Please someone help me, I've being permanently banned, but it wasn't me who was playing, I've spent to much time and money on this game and I have stopped playing, long time a go, since I migrate to Luxembourg, now I have some time to play again, and I realy realy want my account back, I promess you, I've never being banned, never , Please Riot let me play again, it's realy hard to start over again. Thank you, Codeas.
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