Dlf — cancellation o[censored]nit & refund of booking amount

I have booked dlf the ultima in sec 81 gurgaon on 1 condition that if i was not able to get desired loan from bank, i will cancel the booking. The booking amount was given in month of october 2019. I have requested for cancellation on 13/11/2019 since then nobody is replying and also broker city space india not responding. I have sent multiple emails & tried to contact their customer care however no response from their side. Its been more than 6 months nobody is replying or refunding the amount.