Canara Bank — Refund not processed and reference number is provided

Dear sir
Account number:[protected]
Customer I'd:[protected]
I have not got a refund of 149rs which is paid through COD. Amazon had provided me with refund reference number[protected] and saying it is provided by the bank and it should be contacted to bank customer service but I didn't get a response of my refund and saying it is Amazon should look after.so see about what happened to my refund amount and further if it is not cleared here. I am informed to raise charge dispute in banking ombudsman.