Illegal Construction-Threat to my life and property and Pigeons

1. There is an illegal construction on my second floor building in DDA Flats Vasant Kunj, New Delhi. 2. MCD issued Demolition Order in Nov 2005 but the owner manipulated them and all other Officials and till date no action has been taken. MCD now says its under DELHI Act so we cannot do anything on paper and in RTI reply they say action will be taken as per office rules. 3. The building has developed cracks and I had requested Police to file FIR they are refusing , verbally they say which ACT will we use you tell us, we cannot file FIR. When I ask in RTI they write false things like there is no illegal construction going on and close my case. 4. The Pigeons sit on it an its roof and and the droppings and feathers has caused fatal diseases and me and my family members have been affected by it. 5. I want to know what can I do now to alleviate myself from all the sufferings and fear. The illegal construction is hanging dangerously above entrance of my flat over my courtyard.