SBI — refund not credited from bank side

Address: Sikar, Rajasthan, 331024

A refund of 425 rupees was successfully processed on 15 april 2018 to my account by amazon. This amount should have been credited to my sbi account by 19 april 2018, but i have not received the refund till now.

I have called the state bank of india customer service and also emailed the state bank of india main branch all the details many times including the unique transaction reference number but nobody has replied or resolved the problem. No action is being taken

I have confirmed with amazon and they have successfully processed the refund

Kindly go through the charge dispute emails, locate the pending refund and follow the path back to amazon's payment processor to locate the refund.
Rs.425 has been processed successfully on[protected]. The amount should reflect in your account by 4/19/2018.

The authorization code (Refund reference number) for the transaction is 217800.
My account no is [protected]