Is it possible for a company admin ( Me/ Owner) to remove all access from the Primary admin ?

As a Company Admin, you cannot remove the Primary Admin, as they hold top-level account ownership. Thus, the role must be transferred rather than deleted. 

If you are still in touch with the previous user, ask them to transfer the role to you using these steps:

1. Access the Manage users page and locate your name in the Users tab list.
2. Select the dropdown arrow in the Action column, then choose Make primary admin.
3. Select Change primary admin to confirm the change.

If you cannot contact them or sign into their account, you will need to submit an official request to our account protection team to take over as the Primary Admin.

If you have any other questions about managing your team, drop a reply below. We'll get it sorted out.

@simon104 

Another option, purchase a 3rd party service to migrate your data to a new QBO account.