Sobha Developers — non refund of booking amount

I have booked a unit in sobha pavilion unit no. 3084 for which i paid a booking amount of inr 6.7 lacs. Sales guy mr. Chandra sekhar gave me a cost commitment for this unit with 5% gst. He told me in case gst is 12% then he will refund the entire booking amount. Based on this trust i booked the unit in sobha pavilion.in june end he confirmed that gst will be 12%. So i asked him on 2nd july to cancel the property as it was costing huge to me. Mr. Chandra confirmed me that if property is cancelled then refund will come within 60 days. So i asked him to cancel and initiate refund. He told me cancellation has happened and i will get refunded within 90 days. Now he is not giving response to my calls. I had a word with processing team they told that this property is not yet cancelled. Mr. Chandra has asked them not to refund until property is resold. I am also paying interest on personal loan on the above amount. How can a employee of such a reputed organisation can see his personal interest. Such a behavior from employee damages brand image of the company as well. Would request you to refund my money by september end as i am going through a huge financial loss.