Booking.com Property Refund Request

I made a hotel reservation through Booking.com for “Burlington Residence - Mayfair Border” for the dates 12–17 July. To secure the booking, Booking.com emailed me stating that payment was needed, and shortly after the property owner sent an invoice to my email. I paid the requested amount, and the total I was charged, including bank fee, came to £1,675. Despite having paid, the property later cancelled my booking without giving me any explanation or prior information. In my Booking.com account it only shows “free cancellation”, but there is no clear information anywhere about my refund, the status of my payment, or how and when my money will be returned. At the same time, it appears that the money has already been sent to the owner after they issued the invoice. After the cancellation I tried to contact the property via the Booking.com messaging platform, but my messages fail to send and I keep getting an error that they could not be delivered. I also tried to reach Booking.com customer service by email, but my emails either go to a no-reply address or receive no response at all, and the support within Booking.com is only automated AI replies, which do not address my case or provide any solution. I am left without a confirmed place to stay and with £1,675 already paid and no clear information or assistance from either the property or Booking.com. I request that the full amount of £1,675, including the bank fee, be refunded to me as soon as possible, and that I receive written confirmation of the refund and clarification on how this situation was allowed to occur after I followed the payment instructions provided by Booking.com and the property.