State Bank Of India [SBI] — refund not credited - charge dispute

Address:	Mumbai City, Maharashtra, 400084
Website:	Amazon.in and State Bank of India

The refund of ₹999 was successfully processed from amazon.in, and the amount should have been credited by now in my account.
The refund reference number generated during the time of transaction was 74332748312831165557017.
The refund was initiated by amazon.in on 7th nov 2018. Amazon.in is not providing any proof of refund eg., statement of transaction
Kindly look into this matter and please solve my query asap.