State Bank Of India [SBI] — Refund initiated by Amazon but not received in bank account.

Address:

State Bank of India branch, Thycattussery.P.O, Cherthala, Alappuzha,Kerala.

Sir,
I have ordered a product(Order ID=[protected] worth RS 3499 from amazon on 7/4/2021.
I paid Rs 1948 from my 'Amazon Pay' and the remaining Rs 1551 from my Debit card.
Later I cancelled my order and I received the amount(Rs 1948) that i paid through 'Amazon Pay' on the same day but I haven't received the amount (Rs 1551) that I paid through Debit card.
When I contacted the Amazon they gave me a 'Refund Reference Number' (RRN = 574328) and said they had provided a refund from there side .
But, the response that I got from my SBI branch & SBI customer care was not at all satisfactory, They insist they could do nothing.
Please help me to get back my refund.

*Bank Acc no=[protected].
*All other details attached below.