Godrej Properties — Refund Against cancelled booking

I booked a 2bhk along with my friend in Godrej Nuture, Mamurdi Pune but due to personal circumstances I am not able to go ahead with the deal, however my friend is continuing with the purchase. I am being denied refund of my booking amount (50000). Ideally I should get the full refund however any nominal deduction is understanble but denial of no refund of any type is unfair. Request you to please do something. It is not expected from brand like Godrej, how will I trust in future for anything.