DDA — refund security amount deposited but not refunded till date

Address: New Delhi, Delhi, 110019

Website: DDA

I have booked a community hall with refunded security deposit amount of rs. 12830 with dda alaknanda, new delhi dated 28th april 2017. Still i have not received any refunded amount till date. My payment transaction no id ctx[protected] dated 28/04/2017. Dda told that amount has refunded but still not getting any amount. Please do the needful so that i will able to take my money as soon as possible.