[Resolved]  ICICI Bank — refund not credited even after refund period has transpired

I booked a bus using 'red bus app' and paid online. I had to cancel the booking due to uncalled reasons. I was eligible for a refund of rs 326 which was supposed to be credited in my bank account within 7 working days which didn't happen. I contacted red bus. They have shared the details of refund being processed successfully. But icici bank hasn't credited the assured amount in my account. Following are the required details:

Po no. :[protected]
Refunded amount: rs. 326/-
Arn or refund reference no.: 20191117111212801300168134450538829
Refund type: merc_to_bank