Priceline They are not giving me a credit issued by the Hotel Internet

I checked out of Ramada in Charlotte, NC on 5/4/15.  The Hotel Manager issued me a credit, which Priceline is refusing to give me.  I have been working with them since 5/5/15.  They acknowledge that they are processing a credit.  I was assured I would receive the credit within 5-10 business days.  I have not received it.  They reported this to their Accouning department and I was told on 5/15/15 that the Accounting Department would contact me within 5 business days.  I have heard nothing.  I called back today (5/22), and I am being told, again, that there is a credit processing and someone will be in touch with me; that there is no one to speak with about it, only their Customer Relations department who cannot help at all!