1. If it is a lease hold property, its title can not be convayed through Sale Deed, i.e. it can not be sold. It can be sub-leased or assigned, if the same is permitted in the original lease deed. However, when the leased period is over, the title of the property goes back to the leassor for which you can no more sub-lease it. Immediately file an application for renewal of the lease agreement before the Leassor. If it takes more than 3 months, file a Writ Petition before the High court against govt inaction,
2. You are no longer the leasee of the said property after the said lease agreement has expired. Before the said lease agreement is renewed further, you have no locus standii in connection with the said property legally.