They call and say they are oxygen providers, I also get oxygen but they harass me, Tell me my doctor has ok’d is, One time told me I had to go to a different provider then changed. They told me finally after calls from last august that they got approval from doc which was given months ago, Now, Again they are harrassing me and even calling me at 6 am. I don’t know any medical supply company who would do this, And I can’t understand most of the people who call,