Dear client
As per Rera you can file a complaint under section 31 of the act adjudicating officer or regulatory authority to get refund Under section 18 of RERA
Section 18 of The Real Estate (Regulation and Development) Act, 2016 clearly lays down that if the promoter fails to complete or is unable to grant possession of an apartment, plot or building,— (a) in accordance with the terms of the agreement for sale or, as the case may be, duly completed by the date specified therein; or (b) due to discontinuance of his business as a developer on account of suspension or revocation of the registration under this Act or for any other reason, he shall be liable on demand to the allottees, in case the allottee wishes to withdraw from the project, without prejudice to any other remedy available, to return the amount received by him in respect of that apartment, plot, building, as the case may be, with interest at such rate as may be prescribed in this behalf including compensation in the manner as provided under this Act: provided that where an allottee does not intend to withdraw from the project, he shall be paid, by the promoter, interest for every month of delay, till the handing over of the possession, at such rate as may be prescribed.
The promoter should compensate allottees in case of any loss caused to him due to defective title of the land on which the project is being developed or has been developed, in the manner as provided under this Act, and the claim for compensation under this subsection shall not be barred by limitation provided under any law for the time being in force.
Section 12 of the Act also states that if a buyer has made an advance or a deposit on the basis of the information contained in the notice advertisement or prospectus, or on the basis of any model apartment, plot or building, as the case may be, and sustains any loss or damage by reason of any incorrect, false statement included therein, he shall be compensated by the promoter in the manner as provided under this Act: Provided that if the person affected by such incorrect, false statement contained in the notice, advertisement or prospectus, or the model apartment, plot or building, as the case may be, intends to withdraw from the proposed project, he shall be returned his entire investment along with interest at such rate as may be prescribed and the compensation in the manner provided under this Act.
These are the sections which empowers you to get the refund from the builder as you have not invested in the property to give the builder indefinite time for giving you the possession of flats or giving you incomplete flats.