Canara Bank — dispute transaction amazon

My account no[protected]
I purchased a product on amazon on 7th of this month using my canara bank debit card same was not received and i asked then for refund. As per their confirmation refund was initiated on 13 th of this month maximum time frame was 7 days. Still it was not reflected in my account. They had provided the refund reference number as[protected]. I had contacted your customer service number they is no proper response hence i mail you. Please check and confirm the status if your response was worst in mail too i'm going to file in banking ombudsman.