help me please

hello please some one help me riot games help me i got email that i was baned from league of legens for the use of prohibited third party software i dont know that is that i played lol from 2012 a put soooo much time in that and soo much money i lowe this game its part of my life 2000 euros i spend for it i lowe it after email i got second email that someone was trying change my password please help me someone i will pay to get my account back i will even call to america let me know guys pls i will be soo thankfull fot it much lowe