Upgrading to paid plan

Hi There,
We’d like to upgrade our billing plan to take advantage of paid containers. We have been in touch a few times before and were told that one of the organisation members needs to be a GitHub admin. A few of us tried to make changes accordingly (we are all GitHub org admins) and still we couldn’t do it.

Just wondering if you can have a look. Our org is at https://circleci.com/gh/organizations/starcount/settings

Thank you.