Canara Bank — payment not received of online order purchase

I purchased a product on amazon on 18th mar h 2020 using my canara bank debit card. Due to delay in delivery and current situation of the country order ahs been cancelled by amazon on 3rd of april 2020. The refund was also initiated on 3rd april 2020 with maximum time frame was 5 days. The amount of rs. 369/- is still not reflected in my account. They had provided the refund reference number as 74332740094009326617837. I had contacted your customer service number there is no proper response received and was advised to submit a complain here. Request you to please check and confirm the status of the refund.