I am panicking. UW MEDICINE

I am due for my infusion at the uw ms center in seattle on the 22nd and I recently got a new job and my insurance changed. it said on the uw website that they accept cigna health insurance, but the infusion center just called me saying they cancelled my appointment because my insurance didnt approve to cover because the infusion center doesnt take cigna ???? Literally what the fuck do i do now? im feeling so scared