Too much mess so little time

Well right now, I'm having insurance issues. I have brand new insurance starting nov 1, and I need a referral letter from my new primary physican for my appt for nov 7. Bad thing is I've been trying for 2 days to get in contact with the new physican, i even left a message, i haven't gotton in contact. If I can't get in contact with them by tuesday oct 30th, i'm calling my insurance company and switching back to my old primary physican, it's not a thing that i want to do, but i may have to just because i need this letter to learn my future soon.