Delhi Jal Board — water wastage and dirty service lane

Address:

2nd and 3rd floor, b-61, phase-1, Ashok vihar, New Delhi, Delhi, 110052

Hello
I am a resident of B-78, phase-1, ashok vihar, new delhi-52. My neighbours, house number b-61 2nd and 3rd floor, have been wasting a lot of water from past few months. Their house is behind my house and water constantly flows out from their pipe into our service lane as they always leave their motor open for hours. I have contacted them many times over this issue and they always say that this is the last time.
This is not only shear water wastage but it has also made our service lane extremely dirty.
I request an immediate action.

Thank you