In January I called Praxaire and tried to order a mask.  They had to get authorization and it took forever because of my insurance.  Long story short Praxaire sent the wrong mask and sent the 6 ft tubing that I did not order.  I called immediately and Praxaire said they would send out new mask and a return label so I could send back the wrong mask and the tubing.  As soon as I got it I returned it. 

Well somehow the company that did the authorization for insurance company is billing me for both masks and the tubing.  I called Praxaire to find out they have been bought by Apria (or something).  Apria would not talk to me.  I talked to Praxaire and they do not show I sent back the mask and tubing.  Because I do not have the tracking number they said they cannot help me. 

I asked them for a copy of my billing and they said that dept is closed.  According to them it shows I have a credit on my account.  Not sure how or why I had not been notified of that.  They basically said that I do not owe them money and that they did not know how this other company can be billing me. 

I called CareCentrix (the company I am getting the bills from) and told them I only received a mask anf filters and that I received no hose and only one mask.  They said they have to send this out for research and it could take 2 weeks to get an answer.  This was about a week ago. 

Today I received three bills from them. 2 are the same invoice number and the same amt.  One is for another mask.  I am so frustrated.  I do not know what to do.  I agree I owe for one mask, one package of filters, that is IT! 

Any advice?