1. Where did you heard of this?
2. Well, nowadays these KMB customer service center are located at
important bus stops/bus terminus, such as in Sha Tin Town Center
Bus Terminus (under the New Town Plaza), or the Cross-Harbour
Tunnel Toll Plaza bus stop(s) (near the tunnel entrance and just
beside the Hung Hom Railway Station).
Usually these Customer service centres would provide information
and sell some souveniors of KMB such as stationeries (much cheaper)
and bus models (much expensive).