Air Deccan — non refund of cancelled flight dn 192 dated 5th oct 2018

Air deccan flight # dn 192, mumbai to nashik dated 5th oct 2018 (Pnr - ejmr21) was cancelled by them and cost of my 4 tickets worth rs.8000 were supposed to be refunded within 14 working days. But as on today even after more than 100 days the amount is not refunded. Had contacted customer care through email several times and they responded that "concern team is working on processing the refund". But since last few weeks there are no response on the reminder emails and none of the contact numbers seems to be relevant. Even emails to their nodal officer and appellate authority are in vain.