Living in a house for 30 years aunt died can I claim the property?

Ok so my aunt who has adopted me legally was living in a house in Delhi since 30 years and was paying a rent of 5,600 rupees for a massive house, now that she has died , the landlady wants me to leave the house as well...the electricity and water bill comes in our name and we don't want to leave this house as we have nowhere else to go plus the people who have their name on the registry papers have all died even their sons...just the daughter in laws are there who don't have their names on the house papers and want us to leave. What can be done in this case ?