Canara Bank — refund not credited to my account till now

I used my atm card for purchasing on amazon rs 230 on dec 29 but due to cancellation full amount rs 250 refunded in my account from amazon on 5/01/2019 with the refund reference number for the transaction is 75503729006025976291061 but till now no amount credited to my account. I also try to call bank costomer service but no satisfies solution provide by them so please look into this problem and refund my money back.