Punjab National Bank [PNB] — refund not received from online purchase from myntra

I ordered a gap henley t-shirt from myntra.com with order id :[protected]-0856503 on 6th of january and i made the payment through my pnb debit card now according to myntra refund terms and conditions the amount is refunded within 7 to 10 days if it's paid it's paid through online banking and i cancelled the item on 6th jan itself, so when i talked to myntra customer care they said the amount has already been initiated from there side on 7th jan so it should reflect in my account latest by 16th jan and it has been already more than a day and i haven't received my refund yet.
Bank reference no. : 75105179007001559341978