Karsten Homes — Palm Groves

I have booked a flat November 2018 with Rs. 2, 88, 000 as a down payment, and loan disbursed of Rs. 15, 00, 000 on October 4, 2019, and they not paying any Pre-EMI, as they said they will adjust the Pre-EMI in the final payment at the time of possession of the flat, and it's 3 years over but there is no progress in the construction, it is just 10% completion (only Basement has completed), around 22 Lakh rupees i have already paid, and worrying about my money as i need to pay loan and house rent as well. Please help me to get cancellation of the flat and refund of my amount, else my life is going to be a hell. Pls help.