BOOKING.COM NO AFTER SALE SERVICE

I used Booking.com to make my DECEMBER 2024 reservations My stay at the Corp exec Doha hotel was terrible ,I contacted Booking.com and complained and with their permission I rebooked at the Qabila hotel.. I did the booking through booking.com as well. I was told the refund for the Wxecutive Corp hotel will be done within 21 days Many calls and all requirements were sent to booking.com I made several calls and was received with empty promises. Their emails get returned . Contactacted the hotel personally .. they too were of no help. It’s now almost 10months NOTHING was done.