HI! I went through the same thing with Cigna. It took me almost a year from start to finish with them to get an approval. I got the run-around from them saying they didn't receive all of my paper work, they couldn't read the faxes, I had not completed all the nescessary steps for an approval....you name it they tried it.
When I went for my first meeting about the Lapband I received a 3 ring-binder full of information from what I needed to do... to what to do if you are denied. They had an attorney in California that helped with obseity surgery denials, and suggested going with them. The attorney that helped me was Walter Lindstrom at Obestiy Law. It was funny, once they took my case Cigna heard the name Walter Lindstrom, and Obesity Law... it didn't take but a phone call and I was approved. :welldoneclap: So you might throw in their name and Cigna might give in a little eaiser.
Good Luck to you! Don't give up, as that is why they are making you jump all the hoops, thinking that you will give in and give up! It is very well worth fighting for!