Booking.com refund

Greetings. My friend and I had booked for accommodation with Booking.com at 1 Albert Road, Cape Town, South Africa, 7915 on the 12th of July 2024. On the arrival day which was on the 6th of December 2024, we were told by the reception lady that our booking is not found on their system. We contacted Lloyd per the number mentioned on the website of the apartment advertised, but he didn't give us clarity on what happened with our booking. Also contacted Booking.com but they only refunded us R99 and not the full amount. Is there anything we can do to get assistance in this urgent matter?