Pizza Hut India — no refund for failed transaction

Address:

Mumbai City, Maharashtra, 400101

I ordered through pizza hut mobile app on 31 may 2017. The money got deducted but order was not placed. I then placed another order and paid in cash.
From more than 2 months i am following up for refund by calling both customer care and the store but no refund till date.
My contact: [protected]
My email: [protected]@yahoo.com
Store: thakur village, kandivali east, mumbai
Store phone:[protected]
Order date 31st may 2017
Amount rs 1135.25
Transaction details:

Merchant reference number :ipz[protected]
Acquiring reference number :74799207151000798610265

I also complained on social network twitter where i was told they are looking into the matter but another week has passed and no action has been taken till date.