Refund of Booking Amount due to Project Delay

Dear Sir/Madam, In Feb2014 I have booked 1bhk with down payment of 3.65lacs with Shree Balaji Builders and Developer at Dombivali(flat no 604 Ekdant bldg out of 8 storage and 8wings). Builder has provided me only receipt of payments which is available with there logo and Directors sign. Builder commited me that they will complete this project before Dec2016 but there is no progress in 3 yrs. Till Dec2016 thay have constructed only 2flrs rest are pending due to approvals and finance issues. In July 2017 after my cancellation he has issued cheques of 2lacs and 1.54lacs with deduction of service tax. Rs. 1.54 lacs is still pending and that cheque has return for insuficiant funds and in last one yr i have visited many time to his office but they are telling that now they dont have funds and they will pay me if they got the funds from Loan of Joint venture. Please guide as i have paid this amount to builder after taking personal loan to get better booking rate and to avoid any delay from my side for this loan i have paid more than rs.50k interest