DDA — Problem of leaking water from the ceiling

Address:

BG-6/135-A PASCHIM VIHAR NEW DELHI 110063

We are a citizen of BG-6 Block Paschim Vihar New Delhi 110063. We are living here for the past 35 years.
And for the past few months, we are having a problem of water leaking from the ceiling of our verandah. The water is leaking continuously and it had already damaged many of our things kept there. We tried telling residents of our upper floor but they didn't take aby action on it. They had their bathroom right above our verandah and when we got it checked by a plumber, he told us that the water id coming from their bathroom from in between the marble floor. We got it fixed but it was a temporary solution and the water kept on leaking.
Out whole verandah's ceiling is ruined and its fragments keep falling from time to time.
Please help us with our issue.
This is a problem which we should not be facing, given fhat, we live in such a good area.
I will provide you with some images to show you what we are going through