State Bank Of India [SBI] — my refund of my order

Address:

barua sagar, Jhansi, Uttar Pradesh, 284201

I ordered a product and i returned it but i not get my refund when i told it to the company they said they initiated my refund. Refund is stopped by the bank and when i complain to the bank they said "we are not help sir" so please initiate my refund.
I book my order on 4 may 2019 and refund initiated by the amazon on 15 may 2019 and i recieved an email in which it show the money reflects in my accopunt on 21 may 2019 but i not got m, y money i book the order of 5999 in which i get 500 cashback in my amazon pay account so please send me the 5499inr..
Thank you