No contact number for Booking.com - no response!!!!! Bad service

We booked a weekend getaway for the weekend of 27th February 2026 through Booking.com and paid in full. Yesterday, booking.com sent us an email to advise us that the place we booked at IFENWENZI BUSH CHALET would not be able to accommodate us even though our booking was confirmed. Booking.com does not have a contact number as we require an urgent refund as we need to make alternative arrangements and find another place. Booking.com gave us an alternative place but this is not what we want. I have sent various emails to booking.com requesting that someone contact us urgently as we require our money back urgently but no one has contacted us or even read the mail that we sent. Can booking.com please contact us *** Clint Page or can they please provide a contact telephone number to discuss. The service at Booking.com is really appalling and I would never make use of their services again!!!!!