Punjab National Bank [PNB] — refund not credited back to my account

I recently bought some products from flipkart and i used debit card for the payment through phonepe. I have a pnb bank debit card. It showed that the amount would be transferred to my account by 22nd but it wasn't and on the phonepe app, it was showing that the amount was credited to my account, but there was no change in my bank balance. There were multiple items in the order. The total amount was near about rs. 8000. The order was placed on 13th october 2019 and the refund date given by flipkart was 23rd and 22nd by phonepe. As both the dates are gone, i had to write this complaint.