Refund promised but not forthcoming!

In September I booked for 6 people for 5 nights at 8 Fernleigh Drive in Kloof. While making my payment of R6000, something went wrong and I had to pay a second time. I was promised by the person who takes care of the bookings for that property that as soon as the double payment was picked up, it would be refunded to me. I also emailed Booking.com but have never had any reply. What kind of site takes a double payment and then ignores you? There is no way to actually contact anybody at *** so beware! Do not use this site!