Hyundai Motor India — booking amount not refunded even after 4 months plus

Address:

New Delhi, Delhi, 110044

I had made a payment of rs 11100/- against the pre-launch booking offer of the then new launching santro. Subsequently after visiting the hyundai showroom at plaza hyundai, mathura road, we didn't liked the car and sought for the refund of the booking amount. I had submitted a letter to that effect on 29 oct 2018. Its now over four months and the sales manager, mr chatterjee has not yet re-payed me the advance booking amount. Twice i had met him personally, and he was insisting on taking cash which i refused and asked for a cheque. Every time he and his employees came with the same excuse that the cheque signing officer is out of india.
Now recently his mobile is switch off and his office seems to be closed indefinitely. There is also no reply on mail by him or his superiors.
Very pathetic.