A Mumbai resident is facing persistent, heavy leakage from their upper flat due to illegal alterations made by the neighbour. Despite numerous requests and recent repairs to their own flat, the leakage continues, causing significant damage and distress. The resident plans to contact various authorities, including the Dy. Registrar, BMC, and Police, and seeks advice on the correct sequence, specific points to highlight, resolution timelines, compensation, and potential orders to restore the original flat layout.