Union Bank Of India — Not receiving the refund amount of my order.

Address:

EZHUPUNNA, IV/34A,MAVELI HSE,

My name is Reena and i had ordered POLYSTAR Flyer Navy 55 ltrs Rucksack (order number : 30005402960291164757448) in Amazon on 17th October 2020 and after 20th October I returned this order due to personal reason. And on 25th October Amazon initiated the amount to my card but still I didn't get the money. Amazon sent this reference number[protected] and told me to fill charge dispute form but Union bank doesn't have such policy. So please kindly respond to this complaint it is very urgent.
Thank you Sir