Booking.com

I booked a room through Booking.com, and later found it cheaper. They have a best/lowest price guarantee, so I contacted them and provided the proof, but they still refused to honor the guarantee. I contacted Customer Service via the toll-free number but was left on hold. My initial contact went completely unanswered. I wouldn't recommend Booking.com, nor will I ever use them again. Their Customer Service is sorry and pathetic. It's a shame when a big Corporation like Booking.com refuses, to honor their own guarantee.