I have a paid account and a free account. I can't make changes to security; it

I have a paid account and a free account. I tried to add my free account  email address as an authorized user (which caused my meeting ID to change!!). So I deleted the free user from authorized users. But still the 'personal meeting' id has changed, and now I can't change security settings--it wants me to check with an Admin. Huh?  I'm the _owner_ I cannot find any admin listed on the account profile.  I don't see how to add Admin role to Owner account.

How do i become Admin as well as Owner?

Thank  you.