Amazon — Delivery of product on the same day

I have ordered a product from Amazon.in . My order number is[protected] . I paid Rs 99 extra to get the order delivered on the same day.I contacted two times to Amazon support to update my contact number and second time I was assured that they have updated the contact number but later in the afternoon I was informed that the order could not be delivered due to wrong shipping address and I need to contact the Amazon support regarding the same.When I contacted they informed me that the courier person tried to call me on the old number and they found it switch off. My concerned is why I was told by the support that my phone number was updated and later I came to know that it was not.I have paid extra money to get the product to be delivered the same day.Now they are saying that they will refund Rs 99 back to my account.But this is not the issue, the issue is why I was given wrong information and why after paying extra money I did not receive my order.