Canara Bank — redmi y2 mobile phone

I have paid rs. 7299 from my debit card on 31st march, 2019 to amazon for the transaction which has been later on cancelled on the same say but i have not received a refund till yet of my amount. Its been 11 days for such a nuisance. I have to call the customer care everyday wasting my time for the issue to be resolved in which i have no fault. Kindly help me in this regard and credit my refund as soon as possible