Pristyn Care — Refund after cancellation

I have book for for surgery with pristyn. They said that it is free of cost through my insurance policy. I have paid co pay amount of 4, 500 and when I got the hospital they did not inform me that I need a caretaker or the Cygnus hospital without that they will not perform the surgery then I cancelled the surgery. They asked me the payment of one bed cost, bood test and doctor charge, nurse charges of 7, 600. I have paid and left now the pristyn is saying that get a caretaker and come for surgery back again we will refund the amount. I am not comfortable going with pristyn again due to their procedure can you please help to refund my 11, 000 amount 4, 500 for insurance amount and 7, 600 for one hr hospital bill. I will provide all the related info.