Neighbour nuissance through improper building management

Hello, Can anyone suggest me on how to take a legal action against our neighbour who is troubling since two years with his improper construction practices. My neighbour residing on north side of our house has not taken minimum safety measures to place his overhead water tank, also the pipeline to it was not fixed properly due to which sometimes water flows extensively from his overhead water tank (positioned at a height of 20ft approx) fall into our house through the door and windows which slightly damaged our furniture. We notified him about this issue multiple times for over a year, he never tried to fix the problem permanently instead he used to argue with us. Last year (2018), a small quarrel happened between us infront of his house when we went to discuss about our inconvenience, for which he filed SC/ST against us for which we are attending the court and the issue got diverted . On the same day we made a written complaint to police on him mentioning our problem for which we received a Pet.id. But, later our complaint was not considered and later when we asked police they told your complaint has no strength so we closed it (injustice) and the worse thing is even till date we were suffering with the same problem. Inaddition, last night (21/05/2019) the improperly arranged overhead water and roofing sheets fallen into our veranda and just in a few seconds my father and mother moved away from that place otherwise they might got injured severely. we have the photo and video proofs of it recorded in our cc camera. Again we registered a complaint but i dont know how far it is considered. I request for your valuable suggestions that helps us to get rid of all these situations. Thank you