I signed up for a free trial for google apps business for my domain, but decided that I didn't need it. Let it expire, and now can't log in to the domain any more.
I did get one message saying that the domain was on hold due to billing issues, and that I needed to downgrade, but there was no link to do the downgrade. I accidentally signed in as another user while in the control panel, and now I can't get back in as any user.