Punjab National Bank [PNB] — I don't get my refund amount

Hello sir i am Parikshit swami i placed a order from Amazon on 24 June then i cancel that order due to a reason after that amazon initiated that refund amount of 321 rupees but i did not get my refund amount in bank account i tried to contact pnb customer care but they don't respond me it's have been 4 days please reflect that amount on my bank account.my refund reference No[protected]
Order ID[protected]
My bank account no-[protected]