Land dispute

My father was a farmer of a landlord. The landlord gave a land of 2 kattas 6 chotak to my father to stay with family ( my mother and 6 children ). We are still living that land since 40 years. Now my Father and landlord aged about 80 years. I stay with my parents and a sister, rest 4 sister got married. I am a disabled person. Landlord promised my father to gift "DAAN PATRA" in your son name. With lots of hope we make that cultivate land to living land and make 3 rooms with tiles shed, and by grace of God we got "Indira Abasan" on that land. In good faith we never applied to BLRO as bargadar or settlement due to his word. Vigorously we asked landlord to do make the paperwork always he gave us hope only. Land lord has a son and he is a central govt. Custom employee as AC ranked. One year back we gone to his son to request to complete the paperwork because we are scares due to my father old age complications. He is not agreed to do so. We also request for electricity because still we are in darkness (we use harican "Lanthan") that also refused to sign in CESC form. Now he is forcing us to vacant the land with his official and money power. As we are poor we can't legally fight with them. So therefore request you to kindly suggest and help us what to do sir. Eagerly awaiting your kind revert as soon at the earliest. Thank you, Debu Mondal,