Mount Sinai Toronto Referral [on]

For those who were referred to Mount Sinai for their OB care, how hard was it to get in touch with the respective OBs (their practice)? I have been waiting for them to accept/deny my referral for several weeks now. I got a call from a private number today that I unfortunately missed. It was a call from Dr Miller's office confirming I was still looking for OB care. I called them back right away but no one picked up. I left a voice mail and then tried again a few times but no one picked up. Will they call me back? Anyone with a similar experience? I am a bit stressed because I am older and had a soft marker on the NT scan for Trisomy 21 though my NIPT is all fine. I also have 2 large SCHs so really want to be seen by an OB as soon soon as possible.