I need to delete an email address

I need to delete an email address

Hello, I made a mistake setting up Zoho.  I set up the initial email address as info@mydomain.  It would be better if I used this address as a group.  I've set up mail@mydomain and made that the primary address.  However whenever I try to delete the info address I get the error message 

 "please contact your organization admin mail@mydomain to delete your email address"

I'm logged in as mail@mydomain

What am I doing wrong?