Complaint: Booking Cancelled but No Refund Received

I am extremely disappointed with Booking.com regarding a booking I made for accommodation in Durban. I booked and paid approximately R8,600 for two apartments for 7 adults and 3 children through Booking.com. When we arrived at the property on the day of check-in, the accommodation provider claimed that their system only showed one apartment for 6 people. We were therefore unable to check in, and the property cancelled the booking without my consent. Despite the fact that I did not cancel the booking and never received the accommodation I paid for, I have not received my refund. I paid Booking.com for this accommodation and expected them to assist me in resolving the matter and ensuring that my money was returned. Instead, I was left without accommodation and without the approximately R8,600 I paid. I am requesting that Booking.com investigate this matter urgently and process my full refund. I have the booking confirmation and proof of payment available as evidence