Lost or stolen password/account

Hey my account (V.I.P.U),my level was around 104 and my account is probably lost or stolen ,I tried loging in after a few months but my password dosent work,also when I entered the server it had said that my nickname was RevCrew instead of V.I.P.U

Yes,also everytime I try to log in the left corner it says that my nickname is for some reason RevCrew and thats why I think it might be stolen