Anyway, I've been using 3HK (BB + 固網電話 [租pccw線]) for more than 10 years and the overall quality is quite good. Contract renewals were done by back office sales support. And I would never approach 街SALES.
ps. 3HK 固網電話 is ok, especially for those "租pccw線". However, your building got no extra lines ... pity