Bankmed continuously ripping customers off!!

I contacted Bankmed to obtain authorization for a procedure I was scheduled for, upon authorization Bankmed informed me that my Doctor and hospital did not fall within the Bankmed network. I therefore requested that Bankmed provide me with the details of a Doctor and a hospital that does fall within the network. I then schedule an appointment with the Doctor provided by Bankmed for a consultation and scheduled the procedure (even though i did not have a relationship with this doctor). I contacted Bankmed again to update the authorization, and was informed that the Doctor and hospital will be covered 100% by the medical aid. I have been for my procedure and now received a R1500.00 bill for the hospital which Bankmed is not willing to pay as they state the procedure could have been performed in a day hospital. Why did they not inform me that the procedure must be performed at a day clinic? Why did they then authorize Sunninghill Hospital? Always an excuse why they are unable to pay!!! If i had the procedure performed by my regular Doctor then i will be comfortable paying in as this would have been my decision, in the case i had consulted with Bankmed to ensure they would be no shortfall.