Remove organization without having to delete entire group of members (740)

Hi,

I want to remove an organization from my team free account.

But an overwhelming 740 people have joined that organization.

How can I remove this organization without having to remove it's individual members one by one?

I'm the administrator.

Short explanation, I used my private account to set up a team, but because I used the companies name, a lot of colleagues joined thinking it was the official company team.

Thanks,

Joost