Delayed refund - this is not ethical!

Since 12 May, Netcare has held back a R50 000 payment I made to cover the costs of an overseas collegue (it was on a Sunday evening and we could not contact representatives of his travel insurance). It is now 31 May and they are still not able to confirm a firm date by when I will have a refund, although the insurance took over the payment of all bills on 13 May (he works for a lrage international consulting firm so this was never in question). Of course, holding money back like this is good for cash flow and interest earned, so Netcare is in no rush to refund anyone. I've reported them to the South African Medical Association and I suggest that anyone with similar refund issues do the same.