Central Bank Of India — money not refunded in account after amazon sent it

Address:

Darwin House, Stanza Living, Bangalore, Karnataka, 560064

I bought an item on 18th august 2019 via amazon.in and didn't liked it so refunded it. amazon mailed that the amount has been refunded to bank on 30th august only but still i hadn't received my amount. When i called the amazon customer care they said to talk to bank's customer care but the bank's customer care said they couldn't resolve it even when i have refund reference number. So i don't know what to do as amazon customer service says to talk to bank only.