Refusal to refund by Booking.com and Elephants Springs and Cabanas Bela Bela

My husband and I made a booking through Booking. com (for the 9th till the 12th of August 2018) for accomodation at Elephants Springs and Cabanas in Bela Bela, for us and our 15year old daughter. When we got to Elephants Springs and Cabanas on the 9th, the room we were offered only had a double bed although our booking specified 2 udults and 1 child (15 year old) with Booking.com. The place was full and there were no other rooms available. When the reception phoned Booking.com they were of no use and did not even try to sort out the problem instead Booking.com said they would phone back and they never did. The lady at Booking.com refused to give out get name. We were therefore left stranded with our 15 year old in the middle of the night and had to find another accommodation somewhere else on our own. On Friday the 11th we went back to get our refund. We were told by Elephants Springs to phone Booking.com ourselves while we were there and take the issue up with them. We did and both Booking.com and Elephants Springs and Cabanas refused to refund us although we did not stay there, as Elephants Springs could not accommodate us. We were instead told that we will be charged for the booking and therefore no refund will be given to us. Amy at Booking.com did not even try to help us instead put the phone down on us. The General Manager at Elephants Springs also did not help and all he could say was his hands are tied. This is bad business practice on both parties and we will never use Booking.com and Elephants Springs ever again.