Primary Care Partners

I have been going to the pediatric office for 10 years with my children. I loved it for the first 5 years and only stayed for the other 5 because of the one doctor I loved. All the other doctors I saw were a joke and did not actually resolve any of my problems and you could tell I was just a paycheck they need to get in and out and on to the next. My doctor I loved left to start her own practice, due to her own issues with them, I left with her naturally. Now I am getting back billed bogus things that where never done and my insurance, of course, does not cover. I call and ask about them and get the run around and that they will "look into it and get back to me". They never do and in the mean time I get finance charges wracking up and when I call about them they seem to have no clue about previous phone calls trying to clear it up. So either they are just very unprofessional and are giving me the run around on purpose or they do not take notes on accounts to look back on later. Either