Waiting on Pulmonologist clearance letter since September!

I saw my pulmonologist in September. He is also my PCP. I've used him for over 15 years. He was thrilled when I told him my sleeve plans. He did my physical and labs in his office. He said I dont need a sleep study. I asked the office for them to fax the lab results, his letter of recommendation and the clearance letter for the pulmonary part. I must've called the office 10 times since September begging for them to send the paperwork to the surgeon. They finally sent the labs and recommendation letter but he still hasn't sent them the pulmonary clearance. I know I'm clear but "he hasnt gotten around to writing it".I'm getting the run around everytime I call to request it. The surgeon office gets told the same thing when they call. Any ideas what I can do to get him to write the letter. This is holding my surgery date up. So frustrated.