What do yo do when both your dental office and your dental insurance is not doing their job.

A few months ago I had a few teeth extracted.  The treatment plan was submitted to my insurance company prior to treatment.  At the time the dentist told me there would be things  listed that may not be done all depending on what he needs to do for the treatment once he gets started.  I was okay with that because it sounded right at the time.   I paid what I thought would be my co payment of $275.00.

Then I started getting bills from the dental office  showing very little of the services they done being paid by my insurance carrier. I now have this very large bill.  What is on the bill is different then what the orig treatment plan was.  I am not in the dental business nor the dental insurance business so this reads like Greek to me.

I though well that the insurance company would still be paying on this bill so when I got another notice I called the dental office who tells me that they are not sure what they billed out to the insurance company and could not give me a brake down of the charges sent.  I call the insurance company and they said they have been waiting on my dental office to send the claim form  that they requested three times.  The dental office says they did send the claims information to the insurance company.  Since it be so long now, I have to pay the bill to them or they will be sending me to collections.

This is a mess!  The dental office says insurance or not it is up to me to pay them the money currently due.  The insurance company says they do not have to deal with my dental office since I got to pick were I went to.  That they just need a billable claim form for them to process.

Can anyone give me some advise on what to do?