Peer to peer-to-peer

How does this work because I had it out with my surgeons office the insurance.

I called my insurance to see if my surgeon submitted the info for the appeal for the peer to peer. They informed me that my surgeon didn't send the info in time and that they tried calling numerous times and offered them a appeal process.

I called the surgeon office and they stated they never heard from th insurance and that they sent the data. Also the surgeon office said that the peer to peer got canceled by the insurance because that had already denied the surgery so now I am highly upset getting the run around.

Lastly called insurance back to explain what the office said and they stated the same story but it was a different rep for the insurance. So different reps are saying the same thing almost. Plus surgeon lady rep had a attitude. So I am lost and just wonder why its this hard.