What are you talking about?
In Mibew Messenger (both in 1.6.x and 2.0) there are no such things as 'super admin', 'vendor', 'agent', or 'admin'. There are operators and permissions.
On the site there is a demo of
Mibew Messenger 1.6 and a demo of
Mibew Messenger 2.0. You're totally free to test what kind of permissions there is and how do they work.
And read
this before posting further questions.