pagdi system bill transfer & false case.

I reside in a pagdi system room since birth, currently i am residing the with my family, and few years back my father's brother's fist son came with his family in the name of medicine to be done from Mumbai, and few months back i cam to know from he owner the he has registered a case with false documents stating he resides here and he wants bill to be transferred on his name, so can you guide me what is the legal way handle this matter. and the Landlord is asking a huge amount to get the bill transfer on my name can this be done without there NOC.