Delay in possession of an under construction apartment

Delay in possession of under construction Apartment and there is no communication informing me about the delay . As per the agreement , possession should be done within 36 months from date of allotment . Allotment date was 16th July 2014 . So, normal possession should be given by 15th JULY,2017. There was a clause of 6 months grace period . That time period is also over. On January 2018 , i made an enquiry and I was told that possession will be given by March ,2018. The simoco sanhita website www.sanhitarealty.com also published the same information,. Now this is March , I found the possession date displaying in simoco website is secretly changed to June . After repeated follow ups, builder is telling that they will try to start the possession in September and will try to complete by December. but they are refusing to give any compensation for the delay and saying they will apply force Force majeure clause due to demonetization. cant i get compensation because of demonetization?