Delhi Development Authority [DDA] — roof of room is about to fall due to extreme moisture/ sealan (in hindi)

Address: New Delhi, Delhi, 110087

Sir
We are resident of gh-8 paschim vihar. We are living in a dda flat 2nd floor,
One of our room roof is about to fall due to sealan (Moisture). We tried to resolve the issue making friendly conversation with the 3rd floor tenant and a landlord. After so many efforts to convince them, they are not even bothered about their rooms or all other rooms/floors affected due to them.
Their toilet is causing the issue due to accumulation of water.
They are not repairing their toilet neither allowing us to make or decide any solution for the problem. They keep on saying, we are not responsible for this.
We are just blocked, waiting for the roof to fall
Please help regarding this issue, hope you can save some lives