Booking.com Fails to Resolve Availability Issue on Paid Reservation

I made a reservation through Booking.com for an apartment in Vienna for the dates December 6–9, 2025 and paid $1,104 with my card at the time of booking. Although my reservation appeared as “non-refundable” in the system, the property sent me a message through the app saying, “Please cancel your reservation yourself; we will refund your payment.”

I am being asked to cancel because the property claims it is not available, but since the reservation was marked as non-refundable, I do not want to take the risk of losing the funds I paid. During this process, I communicated the situation via message through the Booking.com app, but I received no response from anyone.

I request that the reservation be cancelled by either the property or Booking.com due to the lack of availability and that the full $1,104 charged to my card be refunded to me. I also ask for a prompt, written explanation regarding this matter and for the uncertainty to be resolved quickly.