Refund request for technical glitch. Not my fault.

I booked at Kingdom resorts a few weeks back, directly via the website at 8:42am for checkin on the same day.. When I tried to make payment, it failed. I received a text message and email confirming payment failed. I tried the web link and received a message stating payment failed. I called and they said i may pay when i arrive but this is not normal procedure. I secured alternative accommodation in the interim and since I had confirmation that payment failed I did not proceed to take up the accommodation at Kingdom resorts. That evening at around 7pm I received an email informing me that the amount of R7112.00 had been deducted from my account. Since all the correspondence indicated payment failed, I contacted Kingdom resorts who directed me to Beekman Holidays. I explained that I would like a refund as I have proof that payment was declined. I received a generic response that Booking.com works this way, but I had not booked through Booking.com. When I explained further, I received no response. I sent a further followup email, but have stilll received no response. They could have at least processed the refund or allowed me a stay at a different weekend. I'm really not happy about this.