Amazon India — refund not get of my order walls and murals white board

Address:

122504

I purchased “Walls and Murals white Board” on[protected] from Amazon. I have done the payment by PNB debit (Master Card) but later on i have cancelled my order on the same date[protected]. My refund should get to me by[protected] but it is not initiated to my bank so far. Amazon customer care agent provide me a refrence no. and ask me to call up to my bank customer care and ask to done charge dispute but the bank customer care told me that they can provide me the details related to my bank account only but there is no charge dispute policy can be done towards them. Same answer i got from my bank branch’s manager. I’m stuck what to do?