Pizza Hut — Refund pending for over a month now

Address:

Pune, Maharashtra, 411057

On 25th Jan'17, I'd placed an order for delivery and made an online payment of INR 889.06/-
The delivery was to be done by Pizza Hut at Hinjawadi-Phase 1, Pune but wasn't done.
On calling them up several times, a refund was agreed upon since the delivery wasn't made
On following up with the manager - Mukesh (on call and by personally visiting) I was assured the amount would be refunded ASAP but it is now close to 40 days with no sign of the refund
I've moved out of Pune so can't do a personal follow-up and am not able to reach the manager on the phone.
I've dropped an online complaint with the Pizza Hut branch a few days back but haven't received an acknowledgement, leave alone a response for that either!