Online shopping issue

I purchased a phone on the Flipkart platform on 09/10/2026. Flipkart confirmed that the order would be delivered by 15/10/2026. However, the delivery did not happen on that date. I was told there was a logistics issue and that it would be delivered by 16th October, but it was not delivered then either. This was repeated multiple times, with Flipkart promising next-day delivery each time and then failing to deliver, for about 9 days. I contacted Flipkart and asked them to either deliver my order immediately or cancel it. They informed me that since the delivery is shown as "ongoing," cancellation is not possible, but they have still not delivered the product. I now demand that Flipkart either deliver my order without further delay or cancel the order and process a full refund immediately.