Delhi Development Authority [DDA] — refund not received after surrender flat

Address: New Delhi, Delhi, 110023

Website: dda.org.in

I would like to inform you i swapnil kumar chakhiyar application no 1713380 have sundered my falt within the timeline given by dda.
I have received letter from dda there are some document require for processing of refund, same i have handed over on 21.05.2018 recipt no is rec/h/18/12272.
But after 2 month i have not received my refund amount.
So may time i called dda help line no but no-one pick he phone.

Request you kindly look this matter end expedite the refund process.