On free-tier account I was asked to change password and at the same time i get e-mail about MFA

Summary:

On free-tier account I was asked to change password and at the same time i get e-mail about MFA enablement on all tenancies. Something go wrong and now i cant connect with old or new password.

Content (required):

So the question is : how to reset password if account name is the same as my old works e-mail. But i can't get to this e-mail, because my work changed.

I change my e-mail to private google mail in oracle account and in free-tier account. But when i try to reset password it sends e-mail to the same e-mail as account name, not to e-mail i configured in always free-tier settings