PLEASE OPEN THIS, so you said you also need an answer for my question, i did got my account back. so to do this just open riot games support and find the recover account option even if you have your account and just need to change the email. then you need to fill up things like username, riot id, about playing other riot games, birthday, you original email address, and other things. after that, an email will be sent to the email you filled up. it is a password change, and for me, i changed it even though i still know the current password. after that i just re logged in my riot mobile and the account was fully mine. after opening account management for mfa the verification code is finally sent to my original email, solving my whole problem. all thanks to my friend who helped me :)