Oracle Cloud account is being locked, and the registered email can't login.

Summary:

Oracle Cloud account is being locked, and the registered email can't login.
I can't login the registered email to check the password reset email.

Content (please ensure you mask any confidential information):

My oracle cloud account is locked currently, I have the correct password to login but it goes to the password must change page to ask me change the old password.

but it show the account is locked after I submit the new password.

I can't login the registered mailbox to check the reset password email but I had binded a backup mailbox to the account.

So How I able to unlock the account? I tried with the Live chatbot, it tells me to post the issue here. Please help.