Need justice to my uncle father's? younger brother.

My uncle mr.Antony t.Sanny. age 77, add:Gillhaze CHS, Lourdes Colony, Malad West, Mumbai 400064. He was living there with his wife, my aunt died 3 yrs after her death he was staying alone there. My uncle owns this house, he has a huge amount of FD and lots of other assets, car and jewellery. He has no issues and no children. He was staying before marriage with us in Bangalore. Now he has written a will on our name stating some of the share must be given to us. Inbetween is wife's my aunt's younger sister Mary and her brother-in- law in the month of Jan 2016 put him to Mangalore Udapi old age home. Such a cheap and poor ashram. Due to lack of health care and no proper fecilities my uncle passed away on August 27 - 2016. Since we are the relative of uncle they never informed us about him. Only after his death they informed us. Cominge to the point we have cone to know lately that mrs.Mary who promised to give the share of my uncle's property as per his will is playing a double game now. She is changing the house on her name the chartered accountants says only 5 percent of the share will be given, how does she calculate that. She now says all the documents are on my name you can't do anything. Then what for court, law, will. Who is she to decide on my uncle's property if the will is written in our name. The problem now is we stay in Bangalore, before talking my uncle to ashram they have taken all the vital documents and dairy. They have taken sign from him and made a latest will. Now we don't have any documents to prove that we have right over my uncle's property. She has bribes every one even the apartment secretary is not giving NOC to get a duplicate sale deed or an EC copy. We want to know on whose name the Katha is made. For any questions we ask her she says don't know I will answer through only Lawer notice we are helpless and depressed. Kindly help.