Canara Bank — Not get credit

Address:

Amtala, Bishnupur,oin-743398

I have to get a refund from Amazon.
Amazon customer service told me tha refund was completed and give me a refundreference no.The reference no is[protected].
When I was call Canara Bank customer care then they said it's not a refund reference no.
But Amazon customer service told the refund reference no was provided form canara bank and they had forward the no to me.
Refund processed from Amazon 11/10/2020 at 5.52 pm
Canara Bank customer service try to ignore the matter.
Thank you