Massachusetts: Being told car will be released but don't have insurance sorted

> Tesla Delivery: Reminder, If delivery is not scheduled by tomorrow, this vehicle will automatically be released.

This is the message I get from Tesla. My insurance provider (who we have a Tesla insured under and went through the process with already) insists they can't get me an insurance binder without stamp. I've called three times.

To make matters worse, I've attempted to just make an appointment anyway, and I get the following:

> There are currently no appointments available We are working on increasing available appointments. Please call (888) 518-3752 to speak with a Tesla Advisor.

Don't want to lose the spot because this is a seven seater with an additional $5050 inventory discount. Has anyone run into this? I plan to call the number when I get a moment, but was on hold for 20 minutes and need to get work done, so can't sit on hold indefinitely.