Delhi Jal Board — water is getting wasted in huge amount

Address:

N block Abul Fazal enclave Okhla, New delhi, New Delhi, Delhi, 110025

I am the resident of n block, abul fazal, new delhi.
There is this building (N-44, n block, abul fazal part 1 jamia nagar near al shifa hospital, new delhi 110025) the residents of which wastes a huge amount of water every single day.
The tank overflowed and the water gets wasted for hours but they never cares.
Please look at the matter at the earliest