Xrbia — xrbia eiffel city chakan

Hi, i have booked my flat in a3-206 in oct 2016 with confirmation of possession in dec 2017 which was also mentioned in agreement but even after a year, there is no firm date of possession and every time it's a new date... Also xrbia is not yet agreed to pay the interest charges which is due to xrbia delay... I am not in position to absorb the interest charges, so it has to be pay by xrbia from the agreement possession date to actual date.