Indian Bank — I haven't received my refund amount from Amazon to Indian bank.

Address:

Annamalai nagar, Chidambaram 608002

I have ordered redmi not 9 pro in amazon and i have paid through indian bank debit card(MasterCard) the product they sent me was a defective one and they replaced me with another new mobile that was too a defective piece so i returned the mobile on oct 14 i still didn't get my refund today nov 3.
i had speaked to amazon customer care and visited indian bank home branch nothing have helped me, i got my rr no which was given by amazon and they asked to raise charge dispute. where there is no kind of from like that in indian bank.