In network provider (Saint Francis Oklahoma) not accepting EOB

Just want some advice on what I can do at this point. My research has led me to believe that I am not responsible for any charges for an In network service that shows up as no charge on my EOB but here is my situation.

I had some work done in-network with Saint Francis health systems in Oklahoma. My Insurance is through Blue Cross. I use Saint Francis all the time, and everything is done within their system. I hit my total out of pocket this year already.

When my EOB showed up it said I owed nothing. I get at bill from Saint Francis for some of the work saying I owed. When looking at my EOB, it looks like they did not pay for some of the work because there is a limit to the number of times it can be done in a year. I have had nothing done outside Saint Francis this year, all medical has been with them.

I called a Saint Francis and they are saying “You owe this, because it was not covered” I call Blue Cross and they say “We have a contract with Saint Francis, and you do not owe anything” Call back Saint Francis as a three way call and Saint Francis says “Fax us the EOB” I do, but they say they did not get it. I fax again. Nothing. Turns out the number they gave me is wrong, so I fax again. Nothing. I drive up to their office and deliver it, and they still say I owe.

So what do I do at this point? When I call BCBS they are no help, just saying you don’t owe it. Saint Francis is no better.

Is BCBS right that I do not owe? If so what is my next step here?