Flipkart - flipkart pay later refund

I paid the amount **** INR to flipkart pay later on ** october **** via google pay(upi:- lko.sourabh@okhdfcbank)but flipkart does not update by pay later credit, amount got debited from my bank (PUNJAB AND SIND BANK INDIRA NAGAR ,LUCKNOW) and then after due date they charges the amount of ** INR (for late payment) so i have to again pay the amount to flipkart pay later of **** INR then updated my pay later credit limit but they did not refund the amount was debited earlier and still they i did not receive my refund of amount **** INR. i request flipkart to refund my amount