Email Account Deletion

Dear Zoho team.

i have problem to delete my existing email (not yet activated) and create new user access from my control panel.
the email account is reino@reino.id

i have problem logging this email because somehow it need to login to get the verification code but i cant login to the account.

note: i just add the domain to my current subscrioption plan (username: real.caf@gmail.com, reinocaf.website)

Thanks,