Central Bank Of India — refund not received

My name is Harsh Goyal and I had ordered wiles wireless earphones of Rs. 195(Wiles wireless earphones ) through Amazon on 19 th March, 2019 and on 20 th March, 2019 I returned this order due to personal reason. So the regime of Rs. 145 must be credited in my account which is not still. And on 23rd April, 2019 refund initiated as per Amazon.
Amazon initiated the amount to my card but I still didn't get the money. Amazon sent this reference number
[protected] and told me to fill charge dispute form but Central Bank of India doesn't have such policy. So
please kindly respond to this complaint it's very urgent. My card number is [protected]

Thanks you sir