American Home Patient Discriminate against me and refused to sell me a cpap Machine Lenexa Ks

I had purchased a cpap machine from American home patient and everything was great and fine until the machine was on recall. I called American home patient and was instructed that I should call the manufacturer and that there was nothing that they could do for me. I explained to them that the manufacturer instructed that I immediately discontinue using the machine and that was a problem because I needed the cpap machine to breathe at night. 

I asked American home patient if I could purchase a new Cpap machine which I would pay for since I just got the recalled machine from them within the past 6 months. American home patient decided that they would not sell me a cpap machine and refused to.  Because I had a recalled cpap machine they refused to sell me a new one. They told me that I could not buy one from them all their cpap machines were for new insurance  customers.  I guess because I have a recalled cpap machine I could no longer buy a cpap machines from this company.

I was willing to pay full price for the machine but they refused to sell it to.  How they can discriminate between who is allowed to purchase medical equipment from them and who is not.  My money is just as good as anyone else's.  Why has American Home Patient decided to no longer sell me this life saving medivial device which I need? What makes me different then everyone else who is allow to buy medicial devices from them.