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

Address:

Salboni, Bankura, West Bengal, 722102.

Sir,
I had placed an order on Amazon on 11th February. The order id is #[protected].
But somehow it got cancelled on 15th February, and Amazon e-mailed me about that. On 16th February, Amazon notified me that my refund for the order had been issued.
A part of the order (of Rs. 572) was paid through Amazon Pay UPI (debited from my SBI savings account). After the refund notification, I checked my Amazon app and under 'transactions' tab, there it is showing that Amazon has issued my UPI refund of Rs. 572 to my bank account & it was credited on 15 Feb 2022, 02:31 AM. But still now, that amount has not reflected or credited to my bank account.
Amazon has given a Refund Reference Number (RRN), which is[protected].
I contacted SBI customer care in this matter, but they said to contact the Bank's branch. Today I went to branch, and requested again and again, the Bank manager and service manager to check the matter, but they refused to do anything, they said they cannot do anything in this matter.
I, therefore earnestly request you to take necessary action on the above mentioned problem, so that the SBI bank credit the refund to my bank account as soon as possible.