Canara Bank — Refund money initiated by Amazon but still not received in bank account

I had buyed a boat rokerz 550 headphone from Amazon which cost rupees 1499 on 23th October. then after some days I requested Amazon for a return and refund of the product. they picked up the product on 8th November and refund was initiated by Amazon on 8th november and Amazon said refund will be credited to your bank account from 11th to 13th November.amazon said to wait for 5 days after 11th November. but after 5 days money was not credited to my bank account by canara Bank.i even got refund reference number from Amazon but money was not credited to my bank account by canara bank. after that I contacted Amazon costomer service center then they said to contact canara Bank. when I contacted canara bank they said they cannot do anything.after this much days also my money is not credited to my account by canara Bank