Harras of Sr. Citizenment by Neighbour

I'm resident of Delhi (South -East Distrct) for past 31 years. It is a colony developed by Delhi Development Authority(D.D.A.). Earlier when Flat Allotees came in 1989-91, the occupants (major chunk) were employees of PSUs/Central and Local Governments and acdemicians etc. But now in three decades all that has changed and either majority of original allotters have migrated to neighboring towns like GuruGram & Noida etc.or some or no more now in this world. Here, Iwant to state a plight of Sr. Citizen couple who are being tormented by their immediate neighbor and his family. Having health issues they are mostly confined to their Two(@) BHK Ground Floor Flat, They are not having any one with them to lend support to them. Their immediate neighbor living with his family in Three(#) BHK Duplex Ground/1st Floor Flat is tormenting them. They have got only One Bath Room in their flat and it is profusely leaking and their neighbor is neither reparing his Bath Room, which is above their bath room nor allowing them to get it repaired. They have offered to do it on their own expenses, Now, due to dampness electric fittings too are in bad shape and Sr. aged couple is facing a danger of being getting electr0cuted. Yet matter was reported to RWA/Local Police / South MCD too but no tangible solution could be found . It will be pertinent to mention here that while their neighbor is occupying Gr.+1st floor, his claim is that this leakage is due to 1st+2nd floor dulex. It may be mentioned here that 1st +2nd floor flat is not having any occupant . Its owner was kind enough to allow them (Sr. Citizen Couple) to inspect his flat. It is in perfect dry condition. But RWA's Passiveness matched by Non Cooperation by Local Thana Police and South MCD Staff has enhanced their wows. Kinly provide guidance that how to stir authorities of Delhi Government,The writer of this complaint is himself a Sr. Citizen(75+ Years) Regards