Canara Bank — amazon india have not refunded the money

Address:

Shimoga, Karnataka

I have ordered a product on amazon on 3rd of october, paying through canara bank debit card, and then i cancelled the order, they say they have refunded but the same is not reflected in my account. They have given the reference number673258. But the money is not refunded in the acount. And the account belongs to my father, as he does not know to use l am giving the complaint on his behalf.