Denied Medical Service Today!

I can't believe it! This morning I was denied medical service and I am at a lost to why. I emailed a local cardiology place yesterday and never received a response, so I called them. When I called them, all I got from the lady on the other end was that they weren't going to help me. I wanted a second opinion because I have new symptoms that weren't there before! To be denied service is wrong and and to be denied service without an explanation is even worse. I am disappointed. I wonder if this is even legal?