State Bank Of India — refund is not collected in my account

To,
The chief branch manager,
State bank of india
Main branch
Subject : charge dispute refund never
Processed.
Dear sir,
I purchased watch on amazon of 1749rs but watch have poor quality because of that i return watch to amazon and refund of 1649rs also send by amazon but that refund is not collected in my account. For conformation they give me referance number #[protected].
I have called the state bank of india coustemer service and give details many time including the unique transation referance number but nobody has replied or resolved the problem no action is being taken. My email id is [protected]@gmail.com.
I have confirmed with amazon and they have successfully processed the refund.
Kindly i request to you for process my complaint quickely
Your faithfull,
Coustemer