[Resolved]  Air India — no refund for failed transaction or any info regarding its status

On 21 december 2019 i tried booking tickets for me and my family from chennai to port blair (15 jan 2020) and return on 19 jan 2020 but due to technical issue bookings were repeatedly cancelled but during the fourth attempt money was deducted from my account but ticket was not booked. I immediately called the customer care who instructed me to send email to [protected]@airindia.in with all the booking details which i did promptly and was assured by them that i would get refund within 14 working days but even after 16 working days there is no refund and there is no information regarding its status. Kindly consider my request.
Here are the booking details:
Booking date : 20 december 2019
Flight no : ai 549 chennai to port blair
Date of journey :15 jan 2020
Passenger details : sundar a
Shanthi s
Bhavani s
Brindha s
Flight no ai 550
Journey date 19 jan 2020
Passenger details : sundar a
Shanthi s
Bhavani s
Brindha s
Total amount deducted : 1, 19, 253 rs
Pnr:y7ccb
Pnr: j0keh
Pnr:z1k03
Pnr:j0wkf
Bank details : state bank of india (Online)