Lack of transparency in pricing and delay of deposit refund

My father was admitted to hospital on 2nd April 2021 at 9am and passed away on 4th April at 7am. The hospital took a high amount of cash deposit from us when we admitted him to cover the costs. When we asked about the costs they told us that the overnight stay costs R3,000 per night in the normal ward and around R10,000 in ICU. We asked them for a price list which they failed to provide.

When they gave us the final bill they calculated the costs as 2.5 days even though my father was admitted for less than 2 days. Furthermore, the invoice had much higher amounts than what they quoted us initially. The hospital agreed to give us a small discount and have said they will refund the balance. However, several weeks have gone by and they have still not provided a refund.

Firstly there was a lack of transparency in the prices and now they are delaying the refund for no reason whatsoever. It's difficult to have lost a loved one and then the hospital give us a difficult time with the money that they owe us as a refund as they take huge amount when you initially admit the patient.