Amazon India — didn't get my refund back to bank account

Address:

Amazon.in, Mumbai City, Maharashtra

I have returned my crompton fan on 10th june, 19 which I have purchased through Amazon. It has been 7 days now, but didn't get my refund yet. My refund amount was 2188.75
They told me that they have initiated my refund, but didn't reflect in my bank account. My Amazon id - [protected]@gmail.com
My account number - [protected]
My account name- Shyamal Kolay.
Bank - pnb india
Branch - Barrackpore

I have contacted to pnb customer care but they told me that Amazon didn't give any refund. My refund reference number is 431206
I have paid through pnb debit card. I am sending you the purchase pic and account statement
Kindly solve this issue.