Punjab National Bank [PNB] — myntra refund not received in my pnb account post 12 days

Address:

Rajouri, Jammu and Kashmir

Myntra has initiated the refund of rs 2168 on 12 april 2019 for the order that was cancelled but today is 25 april 2019 still i didn't received that amount in my bank account but i called myntra and they told me to call pnb customer care number and tell them to file a dispute that i didn't received that amount but pnb customer service told me that there is nothing like this thing exits so i request you to please refund my amount and the reference number myntra has given me to ask bank that check with this reference number that amount has been refunded is[protected] and please help me.