I can't log in to my account because changed mobile phone

Hello. I can't log in to my old account. it was tied to my mobile phone, but I lost my phone. Now I have a new phone and a new mail. I can prove that the account belongs to me, I know the login and password, but I don’t remember what kind of mail it was there. created many different mails for different accounts in different games! How can I regain access to my account if I don't have access to my old phone?

I see this message when trying to login:
"We have noticed an unusual log in attempt and your account has been locked to prevent unauthorized access.
In order to unlock your account, please enter the authentication code shown on your mobile authenticator app."