.
We got management to close their water supply. We had to harass management, got my landlord involved as well, then contact FEHD. FEHD needs to send two more letters before they can break into the flat (HK style).
One of the guard in our building was really helpful, good English, he helped a lot, that's why we usually give him good laisee during CNY.
When you buy your next property, there’s an old saying “Caveat Emptor”, or let the buyer beware. Do your due diligence.
A building survey would reveal inherent defects:-
https://www.hkis.org.hk/archive/mate...16141057.0.pdf
If it is evident that the leak is originating from the external wall and the IO refuses or is unwilling to address the issue, you may hire your own contractor to repair the leak. The repair will likely involve erecting scaffolding to access the external wall and applying a waterproof sealant to remediate the source of the leak.