Dear Sir/Madam, you have every right to get cancelled the said flat as per terms and conditions and also you have to claim delay penalty, if you are decided to cancel the same, and the said developer not permitted you, you have to issued a legal notice against the said developer for the same. The said developer failed to comply the demand legal notice, you have to approach the jurisdictional consumer forum to claim your cancellation of flat and to refund the amount along with compensation for mental agony. 1. RERA at present not come into force with effectively, 2. It is fully depend upon terms and conditions of sale agreement/construction agreement/MOU, 3. Yes, you should issued a legal notice against them immediately. If you want my legal service I will do it.