My Fairfox Swarn Nagri possession delay nightmare

Was supposed to get possession by last year end but Fairfox Itinfra ka project Swarn Nagri mein abhi tak complete nahi hua. Builder ne construction-linked payment plan mein phasa diya hai. Ab EMI aur rent dono dena pad raha hai, bohut financial strain hai. Kya koi aur bhi Fairfox se affected hai? RERA mein kya option banta hai? Koi advice is situation se nikalne ke liye?