Punjab National Bank [PNB] — I did not received refund pnb delay

Address:

Village. Dalam, ajnala road, amritsar 143102, Amritsar, Punjab, 143102

I have order asus zenfone pro max1 from flipkart 27 march 2019, but due to some reason order got canceled, they say seller has initiated the refund of 4949, it should be credited by 9 april, today is 15 april i shill not received money, i contacted flipkart coustmer care and they are saying contact pnb coustmer care or raise dispute chargeback form at branch with transaction id [protected] and authorization code uni000. They are saying raise dispute with i'd and code at branch grivence cell. But when i contacted the bank they say they don't know nothing about this. Could u help me somehow