Owner neither giving lease amount nor extending lease

As you are in Group, you can certainly afford a local advocate and make an approach to him as a group and you can find a good solution.

What do you mean by "we have been asking them to return lease money"? what have been the conditions in the lease deed as to vacation of premises?
 

Practices may differ in some cities.  What I understand from the query is that there was a practice in some cities to collect huge lumpsum deposit calling as "Pugdi" which will be refunded at the time of vacation.  A new tenant agrees to take the building on such pagidi (No rent-No interest) and after collecting the new pagidi (which some may call it as lease amount/advance which may not be correct technically) from the would-be, the amount will be refunded to the old tenant.  Now the difficulty is that original landlords may not be believing in the city, and unless the portion/house is vacant, a new tenant will not come, and the landlord is not having that liquid amount to get the present tenant vacated.

(In view of this for senior citizens, all PSU banks introduced a scheme and they advance amounts as a reverse mortgage loan to senior citizens in lumpsum or as overdraft and either Senior citizen can pay or his legal heirs can repay.  If there are no instructions, banks dispose of the building, adjust to their lending, and refund the amount to the notified legal heir.  Unfortunately, the scheme has not received adequate facility though it serves the real needs and necessities of senior citizens.  There are several citizens with huge fixed assets worth crores of rupees and may not have liquidity in case of emergency and a distress sale is the only option to senior citizens till the introduction of the scheme.  There are several cases wherein senior citizens were duped by advancing them petty amounts and taking the agreement to sell etc or confiscating properties by force..  If a tenant is sincere, he can with the permission of those landladies can bargain and find a new tenant, collect such amount, appropriate the legally entitled amount to him, and then paying surplus to the landlady.  )