Anyone here ever met a "patient advocate"?

I have heard of such people. They are even listed in the booklet of services my HMO provides (Kaiser Permanente). Last year, I was in bad shape, in and out of the hospital. No one seemed to be able to put me in touch with a patient advocate. The staff at the first hospital I was in kept telling me the patient advocate would come see me soon, but I was there 10 days and although I mentioned it daily, it never happened.

Later, after I got out of the hospital, I tried calling the number listed in the Kaiser pamphlet, but I got a recording that did not allow any message to be left. I have called all over their facilities, have asked doctors and nurses and receptionists; no one seems to know anything about it.