Punjab National Bank [PNB] — didn't get my refund

I bought a 1 + 6 but due to some technical problems i returned it i had paid through my debit card a sum of 40079. Amazon gave me reference number for the refund and said that your refund will be available on 30 may 2018. Today is 1st june and i didn't see any return or refund in my account. On contacting pnb they say that there is nothing like charge dispute and they cannot help me regarding my refund. What kind of situation is this. Don't people know that this 40079 is earned with hard work and not by crime. We earn money by hard work and we pay trusting on bank but at the end we go so much lost in disputes between bank and amazon that words are less to speak. About. That money was out of hard work and i want it back. Please help me regarding this. My reference number for the refund given me by amazon is[protected]. Please show your patriotism and humanity.