Booking.com review: Refund

I book with booking.com for a stay at Extended Stay American in Fremont Calif. The hotel was supposed to be a non-smoking hotel. Once I checked in and went to my building. The smoke was so strong it gave me an instant headache. I immediately went back to the front desk and asked for another room. Unfortunately, they could not accommodate me, and refund my money back to Booking.com, and informed me I had to get my refund back through booking.com.
I immediately called Booking.com at 888 850-3958 and explained my situation, letting them know, the hotel canceled and refunded my money, due to the issue with smoke. I was assured I would receive my refund. That was on Nov 10, 2024, here it is Nov 27, 2024, and they are still telling me they are investigating. I provided Booking with the names of the Manager and assistant manager. Up until today, far as I know, they have not contacted the hotel. But they received back the money. I have the invoice showing the money was returned back to booking. I will not stop until I receive my refund, even if I have to take them to court, or to the new station. I have booked with Booking.com many times before, without any issues. I find this very alarming. What is most alarming, there is direct contact to Owner/Corporate.