Misu B… Beatri… Oshane… Ziggy …

How is it possible to get a game account back after a hacker has changed the recovery email and the phone number today? I am looking for a way to use my old payment info or original sign up date to prove that the account is truly mine. I need a reliable fix that will help me regain my access and protect my future play. @Leagueof_Legends #LOL