Amazon India — Intentionally failing to deliver product without actually coming at address or calling

I ordered a product but it was defective so I placed a replacement order. However at the date of delivery no one came at my house to deliver product nor I got any call from them. It has been 2 days and the issue remains the same. The last date is near after that I won't be able to place a replacement order. I contacted customer care and they just keep telling me to wait only. One executive told me if I don't get my item by tomorrow (8th April) they will initiate the refund. It has been already past the delivery time and I still didn't got my product. In the end I didn't got anything and I remain with my defective product.