Amazon India — I'm complaining about my refund money didn't reflected on my account

I've ordered book ( integral calculus & boundary value problems) of rs718 on 22/10/2021 but I cancel the order & ask for refund as delivery was delaying by many days .I made the payment from my card, the company customer service said refund money was initiated successfully but till now I didn't get my money yet.
I want my refund money back.
Why they are saying that it has been refunded successfully but there's no sign of refunded amount on my account .