Booking.com Cancelled Confirmed Paris Reservation Without Reason

I had a confirmed Booking.com reservation at GîtEnChassagne in Paris for 3 adults and 1 child (9 years old), with check‑in on 13 September 2026 and check‑out on 15 September 2026. I then received an email from Booking.com stating that my booking was cancelled free of charge, but no explanation or reason for this cancellation was provided. We are travelling from Dublin to Paris and had already organised our trip and other related bookings based on this confirmed reservation, including stays in Alicante and Madrid in Spain, also booked through Booking.com. Due to the sudden and unexplained cancellation, we are now struggling to find alternative accommodation and are under serious stress, as our plans cannot easily be changed and prices and availability are very different now. I tried to reach Booking.com customer service to solve this. I sent an email but have not received any response. I also called the UK customer service number, which was very expensive, and after waiting on the line for about 20 minutes the call was automatically disconnected, so I still have no information or help. My budget is very limited and I cannot pay more for accommodation; if there is only a small difference I may manage it, but I cannot afford a big increase in price. I expect Booking.com to urgently take responsibility for this situation, either by reinstating my original reservation or by arranging alternative accommodation in Paris near the Eiffel Tower for the same dates and under similar or better conditions, without any extra or disproportionate cost to me. I also request a clear explanation of why a confirmed reservation was cancelled without my consent and without any proper support being provided. I ask that you contact me as soon as possible by phone or email so that this problem is resolved before my trip. Confirmation Number: 6077270294 PIN code: 99**