Tenants of Pagdi system in Mulund (W) Mumbai

Dear Sir, We are the tenants from past 40 years of a building situated in Mulund West in Pagdi system. The original owner had made deal with one builder to sell in 2007 which is not completed till now due to the dispute between owner brothers. 33% of the part has been taken over by builder from one of the brother and seems to have transferred/registered in his name. Due to all this building has not been repaired for long and is now dilapidated. Out of total 33 tenants 60% have shifted to other rented place and 40% still stays there. Two days back front side slab fell down and one lady unfortunately passed away. Today BMC has issued a notice under section 354, 488, 491 and section 475-A of MMC act 1888 under section 58 of the said act. They have declared this building under C-1 category and asked all the tenants to vacate the place and they will pull down the structure. Notice has been served to Landlord / Builder and all tenants. There is no action taken by Landlord or Builder till now and people are lower middle class and totally scared that what will happen as in Mumbai it is extremely difficult to move out to other place. Need your guidance on what is to be done in this situation by tenants to protect their right of the house they are currently occupying (both people who are staying physically and who are not).