Booking.com not paying out my bookings

After guests stayed at our establishment July August and September, we have not received our payout from Booking.com although the system shows we did, we have provided proof that the funds were not received and we have called week after week and sent proof week after week. it is now December and we are still not receiving feedback or assistance for our July payout. We have truly tried every avenue to try resolve the matter, booking.com is just not coming to the party with a solution or payment. property id ***