Runwal Group — Paid Amount Forfeited post cancellation

I have booked a flat(CL1 C4 803) in Runwal MyCity on 8th Nov 2020 by paying 54k₹ and submitted post dated check of 23nov2020 of 2lacs₹. It got debited on same date. Due to personal reasons, I wished to cancel deal and dropped mail for same to them on 26nov2020. But they told via mail that "
As discussed earlier and in accordance with the company's Cancellation policy, the amount paid by you, before registration for earmarking the flat/unit stands Non-Refundable under any circumstances.". This point exist on cost sheet on which I signed too. So, could you please shade a light in this context?