Lodha Group — Refund after booking as per promise on mail

I booked a flat on refundable basis on 28thJune in newly launched LodhaCrown project in majhiwada, and had email from lodha group for the same if I will cancel the booking then they will refund the amount within 24hours.
I informed them by next day that I can not go ahead so please as per promise kindly refund my amount but it been 3 weeks and I have not received yet my money and they are not giving proper response for also.
Kindly help me to get my money back because its not less amount also they committed for the same.