Refund not received for my Cancelled Villa C19 - SARE Medowville

Dear Sir, We have booked a Villa, with SARE Meadow Ville, Kollathur Project, Chennai during 2011. Property value 45 lakhs, as per the agreement, handover date is May 2013, but the builder was not able to handover the house by the said period, and till now construction was not completed. I have paid around 42 Lakhs to builder and so far I have paid interest on my bank loan around 7.5 Lakhs for this property, I have waited for almost 6 years and then decided not to wait further and waste my money by paying interest for this property. So I decided to cancel the said Villa during last March 2016 and submitted my cancelation request to the builder. Builder accepted the cancellation and promised to refund the entire 42 Lakhs within 6-month time (orally), but builder failed to do so. After regular follow-up, builder said head office not making refund, and they need to sell the building to another person after that only refund will be raised. Finally, builder identified another customer and sold the villa and received 33 lakh money as 1st instalment. Last December builder released part payment to me around 32.5 lakhs and promised to pay the remaining amount after receiving the final payment from the new buyer. Last March 2017, the new buyer paid the entire amount to the builder, when we asked builder for the refund of balance amount, builder promised to release the same by April 30th 2017. We went again during May 1st week for collecting the refund amount, but now they are saying it will take some more time. And they have more cancellation and refund for other buyers needs to be paid first. I need legal help on this. Can I file a consumer case against the buyer? Is it possible to get stay for the said plot and not allowing new buyer for registration? Since still my refund is pending from the buyer Is their way to claim my interest amount paid so far? Please help me on this. Thanking & regards Swaminathan Email [deleted] Email Id