Owner is not returning the leased amount

I have taken 2BHK for lease in 2014 for 2 years and after due date I have sent renewal agreement for another 2 years lease for same amount at that time owner is fell sick and hospitalized with paralysis and unable to talk and I contacted his father and he has taken the owner thumb impression in agreement and sent to us no problem at that time. and then in 2018 I want to vacate/ renew the same for another term but owners dad Is informed I want to sale the property because we are unable to pay your amount after sold the property we will give your amount if possible you can suggest any one to buy the property after 3 months the bank persons came and given possession notice that the property is under hypothecation owner has to pay to us around 19 lakhs you can discuss with the owner for your amount you need to vacate the premises and then we have spoken to owners father he is telling you can vacate we will pay the amount in 3 to 4 instalments . but my reply for that it is not possible to vacate the house before getting my amount kindly any one give solution because the owner is paralyzed and unable to speak and he is now staying with his father in Chennai but the house leased is here in Bangalore