If your Business Account has many users and you want to remove them from your account so, what you are going to do is:
• Sign in to your Business Account.
• Go to business menu and select Manage your business account.
• Select people.
• Delete user as per your need.
If you having issue removing user from your account you must dial Amazon Prime Customer Service Number 1-844-545-4512. For more information visit us: http://www.amazonprimecustomerservicenumber.com/