Supertech — Refund for basera cancelled unit

Address: Gurgaon, Haryana, 122001

To
Managing director
Supertech
I was holding one basera unit sector 79 gurgaon.
I have cancelled the unit and the same unit has been allocated to someone else.
As per the contract, the new allotee had already paid the amount for the unit and i should be refunded my money.
No one is responding no customer care no manger.
Could someone please let me know how to get the money refunded and the status of refund.
I feel like cheated and just like any other real estate firm, you are no different.
Please confirm me by when the amount will be refunded.
Karan