State Bank Of India [SBI] — payment refund issue

A refund of 699 rupees was successfully processed on 08 jan 2018 to my account by amazon. This amount should have been credited to my sbi account by now, but i have not received the refund till now.

I have called the state bank of india customer services many times but none of them 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.
My refund referance number -691444
My account no is [protected]