In my opinion, if the builder has not given you possession on promised date as per the agreement. There must some penal interest/amount the builder is liable to pay you.
Surely, your flat cannot be taken over by the liquidator as you have registered sale deed.
Apart from the above, you can file a case at State Consumer Disputes Redressal Commission, Lucknow, since your matter is of Noida (U.P.) the law is quite favourable to the buyer recently a landmark judgement was passed by the National Commission, Delhi wherein the Commission has given compensation + Interest to the buyer.