Amazon India - Cheats the customers

Amazon has become another website to cheat it's customers. I needed the product for some special occassion and hence ordered as the delivery time was shown much before that occasion. However the product was shipped much later than that occasion. Since the product is non returnable, I called customer care to cancel the said product even before shipment. I was told to call for cancellation once the product gets shipped. As soon as I receive the shipped status in order details I called again to cancel the order. I was assured by the customer care executive that the product will not get delivered and in case I receive the delivery than reject the acceptance. Inspite of several calls to Amazon I got the product at my place. I rejected the delivery but delivery boy told that he has already marked product as delivered and hence cannot take it back. It means before handing the product to me he marked it delivered. I again called the customer service and told the whole scenario. I was told that now Amazon cannot do anything hence you have to keep the product. I requested them that since the cost is high and due to delay in delivery I have already purchased it from outside but they are not ready to listen and said you do whatever you can, we cannot cancel the order. This is ridiculous on part of such renowned website and I feel they also started cheating customers. I felt very bad since I was under impression that Amazon is an MNC and has high standards of customer service but I was wrong.