The below are best Hotel booking agents and websites in the world for your reference:
Booking
Booking
website: http://www.booking.com/
please click HERE for TEL number in offices worldwide
USA tel: 1 (888) 850 4649
Tel: 800 807-6641 (local, toll-free)
or +1 417-521-0845 (from abroad, charges apply).
Tel: +44 20 3027 7900 (international charges will apply)
Tel: 1-877-477-5807
For other countries'tel, please click HERE.