Punjab National Bank [PNB] — did not receive refund in my bank account

The following refund has been initiated by paytm. The amount has been deducted from their side but has not yet been credited to my account.

Details of refund:
Refund date: 27th june 2018
Refund amount: 23, 000
Account type: savings
Acquired reference number (Arn):[protected]
Transaction reference number:30001281788178171038346

The transaction may be pending at the pnb's payment gateway.
The refund is on the double transactions done on 20th august 2017 of rs 13, 188.

Name: abhijeet kaur.
My pnb account number: 40xx-xxxx-xxxx-x245