Owner is warning to Leave the Business premises imaditely

Hi i am running a small business in Bangalore, so i started my business at 10x10 shop at 2nd year we extended to 30x45 space in same building from past 4 years we were in good business and my monthly rent was 45000 so from recently changes in Govt GST Act i am facing a issue my business is got down now i am not able to pay rent from last 3 months, buy seeing this problem my owner and some other neighbor person has taken advantage telling that u should vacate the premises right away, and my Agreement was closed 1 half years back only owner has told that we are well known persons no need u can continue without agreement also, so now my owner and neighbor person is planing to take us out from business place and they are planning same business to start at same place, but i invested 45,00,000 amount on this business i was having own parent house and i kept that house to mortgage now this people are trying to spoil my life without business and without home so my request is how to face this kind of people and i can't leave this business if i leave i lose my property and i will come to street please help me how to face the owner that i can't vacate my premises