I had a sleep study done and was diagnosed with mild to moderate sleep apnea, I went through the second test for the cpap machine and was given a cpap machine as if a doctor prescribed it but, five months later the medical supplier stated that a prescription was not given so I had to return the machine and plus they are demanding payment for the face mask and tubing. I feel like I should not have to pay anything because this was not my doing it was the sleep center's fault. What do you suggest? Should this be considered negligence? My primary care physician wouldn't even consent to giving me a prescription so that my insurance would pay for the machine.