Delhi Development Authority [DDA] — Reg. Refund of security Amount for Booking of Marriage/Reception site.

Address: Pkt 6 , flat no 106, shanti apartment, sec 23, rohini

I had booked (for reception) the Japanese Park Sector 10 through dda site for 30th April 2018. For which Rs 61170 was deposited and Rs 24000 security was deposited.
Now I had uploaded the marriage certificate for refund but still I have not got back Rs 24000. Kindly do the needful at the earliest. Related documents are attached for your reference.