Canara Bank — bank is not processing my refund money

Address:

Agra, Uttar Pradesh

I returned a purchasing to amazon on 20.11.18 for which they had initiated the refund within two days i. E 22.11.18. It has been over fifteen days that canara bank has not processed the refund into my account. I called up the canara bank customer care three times regarding the same issue, which they did not repond satisfactorily and wouldn't accept the issue inspite of the refund reference number that i provided them, which was guven to me by amazon. I want to charge dispute for the issue. I want my refund money in my account as soon as possible.