Refund not received since June

Booked accommodation at Drakensberg Sun in March 2015 for.June 2015. Accommodation was cancelled in June with enough time to receive refund. Realised in September that refund wasn't processed so called call centre and told that refund wasn't proceed. Called back after 10 days, still not processed. Then told that refund was processed but it wasn't reflecting on statement. Contacted credit card/bank and they couldn't see it. Bank then called kulula direct to sort out. It was discovered that refund was paid to card which had been cancelled due to ***** but we were never told that the refund hadn't gone through. Called on Friday and supervisor, Serena, said that accounts person, Benson, would call today but by 4pm hadn't heard anything. Called again and he had left. The refund has still not been processed. We expect refund PLUS interest for 5 months