Yes you do have to be your own advocate. If I had not liked my doctors I would have found new ones. When my husband was dx with cancer we dismissed one of his oncologists and found another. It was easy. We are in the Kaiser system.
All that being said, If you can't get a hold of this doctor and his team find another one. My suggestion is to check out the local Cancer centers in your area. Join a support group locally, find out who these ladies like and don't like. Become an investigator. Your health depends on it.
Please come back and let us know how it goes.