My parents went out for a leave and liscencen agreement with the tenat on feb 2013. However they di

My parents went out for a leave and liscencen agreement with the tenat on feb 2013. However they did some mistake while doing the agreement. No witness signature present in the agreement. Signature of landlord and tenant interchanged.No dates mentioned either. No notary has been done of the agreement. Rent bills signed by my fater but the agreement is on the name of my mother and tenant. After expiry of the agreement on october 2014 my parents have asked to vacant the apartment but the tenant denied neither they are interested doing any compromise. Now they are asking to renew the agreement with different person's name of their family and without gurantee that they will evacuate the apartment after expiry of the new agreement. Considering so many loop holes in our expired agreement we are not very sure what we should do to evacuate the apartment. The tenat is not interested to talk to us either. So seeking your advice what should we do? Is going to the court can resolve this issue?