Canara Bank — refund initiated from amazon... but I didn't receive it in my account

Address:

625016

I cancelled two items which i bought in amazon. The refund has been issued from amazon 7 days before. But it's still not being reflected in my canara bank account. They gave me the reference numbers of 555740 and 391042 respectively. I contacted the branch in person and bank's customer care portal. But they didn't even want to listen the numbers. They are saying casually that it may even take 45 days to get the amount credited back into my account .