How To Reach Booking.com To Cancel My Reservation And Get Refund

I made a same‑day reservation for the Mandarin Oriental hotel in Paris through Booking.com with a check‑in date of 18‑10‑2026 and check‑out on the same day. Although the payment of 785 USD was taken from me, I never received a confirmation number and the reservation did not appear in my account or email. I contacted Booking.com customer service about this issue, and they informed me that they cancelled my hotel booking and that a refund would be processed. However, I have still not received the refund of 785 USD. Because there was no usable confirmation and I could not benefit from the booking I paid for, I request that the full amount be refunded to me without further delay and that this issue be resolved urgently.