Booking.com is a parasite of the industry. It was widely used in Turkey as well. Once, I booked a room through them but there was a problem with the reservation (hotel's fault) when I called their call-center for help they didn't even have a turkish speaking staff. I had to speak in English in the middle of Turkey to solve the problem.
After awhile government banned them to operate in Turkey. That was a good decision.
I was looking at an otherwise nice flat to rent in Amsterdam on Reguliersdwarsstraat, but the balcony had a scenic view into the vast expanse of Booking.com headquarters open office space cubicle wasteland, which was waaaay too depressing to look at every day, so I decided could not possibly bear living there.
I arrived at the hotel. They overbooked the rooms. It was late at night. I called the booking.com call center. They didn't have a Turkish speaking staff.
After awhile government banned them to operate in Turkey. That was a good decision.