I'm appealing MOO's decision and I expect much more run around

I filed a short term disability claim with Mutual of Omaha. During the process their original form faxed to my doctors office to be filled out then, and other medical records requested, to be faxed back were claimed to not have been received by Mutual of Omaha. I requested my doctor’s office, multiple times, to re-fax the documents, still Mutual of Omaha claimed they were not received any of those multiple times, although my doctor’s office had fax confirmation forms showing the transmissions were successful for each & every time. Not until I was given an alternate fax number direct to a specialist, and witnessed my doctors office transmit the fax, were the faxes received. This process and their run around dragged out the review process to 47 days. My claim was then ultimately denied based on a second doctor’s evaluation & not my primary doctor’s findings and original reasons for my claim. Now I must appeal their decision, and I’m contemplating how much more run around and how long of time this process will be dragged out again!