PROMISED REFUND NOT HAPPENING

I BOOKED ACCOMODATION VIA [URL Removed] FOR PLETTENBERG BAY. ON THE MORNING OF OUR DEPARTURE WE WERE TOLD BY MILKWOOD MANOR ON SEA THEY MADE A DOUBLE BOOKING FOR THE ROOM TYPE WE BOOKED, WHICH THEY TOOK FULL PAYMENT FOR IN AUGUST OF THIS YEAR FOR DECEMBER BOOKING, AND WE WILL NO LONGER BE STAYING IN SEA FACING ROOMS BUT WILL NOW BE STAYING IN INLAND AND LAGOON FACING ROOMS. I CONTACTED [URL Removed] AND THEY TOLD ME THEY FOUND ALTERNATIVE ACCOMODATION AND THAT I CAN BOOK THIS AND THEY WILL REFUND US THE DIFFERENCE, I HAD TO ONCE AGAIN PAY IN FULL FOR MY ACCOMODATION VIA THE [URL Removed] WEBSITE AND ONLY GOT REFUNDED 4 DAYS LATER BY MILKWOOD MANOR. I AM NOW TRYING TO CLAIM THE DIFFERENCE BACK FROM [URL Removed] AS THEY PROMISED THEY WILL REFUND ME FOR ANY ADDITIONAL COSTS INCURRED, THEY NOW WANT RECEIPTS FOR THE PLACE WE STAYED IN AND THE MORE I EXPLAIN TO THEM THE BOOKING WAS DONE VIA THEIR FACILITY AND HAD TO BE PAID FOR BEFORE I GOT TO THE NEW PLACE THE MORE THEY INSIST ON CONFIRMATION OF PAYMENT, I HAVE SENT THE BOOKING CONFIRMATION TO THEM THAT CONFIRMS THE AMOUNT WAS PAID AND NO BALANCE IS OWING AND EVEN SENT MY CREDIT CARD STATEMENT TO THEM BUT NO REFUNDS TO DATE.