My account got hacked and permanently banned. HELP!

SERIUS G4M3R - Summoner Stats - League of Legends
SERIUS G4M3R / Platinum 2 22LP / 149W 146L Win Ratio 51% / Ezreal - 6W 10L Win Ratio 38%, Miss Fortune - 8W 6L Win Ratio 57%, Xayah - 4W 6L Win Ratio 40%, Heimerdinger - 4W 5L Win Ratio 44%, Ashe - 4W 4L Win Ratio 50%
Hey! My account got hacked and someone apparently used third party applications while playing 3 ARAM games on my account and got me banned. Is there a way to recover my account or is there a way to contact someone in Riot? I don't know what to do! PLEASE HELP!
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