State Bank of India — regarding my refund

Address:

Delhi, New Delhi, Delhi, 10091

I want my refund, i got a mail from amazon with complete information about refund, i called amazon customer they told me refund of rs.13990.00 has been processed successfully on 8/4/2019. The amount should reflect in your account by 8/12/2019.
They provided the authorization code (Refund reference number) for the transaction is 331978.
I asked many times for help to bank, they are not helping regarding my refund. I completely fed up this, please look this matter personally and provide my refund