Consumer Redressal

Hello Sir, I had bought an under construction apartment of Rs 28.5 lakh in Sep 2011 from M/s Sanjana Build- Tech. ( Sanjana Serenity) The possession was in 2013 Feb. When my self & my father vistied in Jan-13 , it was a shocker for us and after seeing flat my father died next day due to heart attack( (Pathetic condition). After i could not able to visit because of mental trauma and work pressure. Till Jan-2014 I have made payments as per the schedule thru home loan from can fin homes. I made payment of 90% asking them to complete my apartment first.Now it is May 2015 and the apartment is not yet finished. They have completed other apartments in the building.The builder has done the registration to others except few and now he is not responding to calls and not even meeting with me. I have a mail saying if it is delayed Rs 8000 per month will be reimbursed. Now I am paying full EMI to Bank, I am having my own doubt that builder would have sold my flat to others. I want to somehow get