I need to delete two domains registered in my Zoho Mail Account and add a new one

I need to delete two domains registered in my Zoho Mail Account and add a new one

This is the message I am getting. my account is nlellis8@gmail.com.  How can I delete the two registered domains and change my primary domain to a new one?  URGENT!




This domain is registered by zoho.please contact support@zohomail.com for further details


ThT