Flipkart - Wrong product delivered

I have ordered a toy drone for my child on his bday. The date was **July ****. I got delivery on *th August ****. I was suspicious because that package was too small to be a drone. So I asked that delivery man to open that package in front of me. I made a video of that unboxing, I was shocked as there was a water bottle instead of drone in that package. That delivery man told me sorry sir it's a mistake by the seller then i refused to take that product. Then delivery man called his e kart manager and then that guy assured me that the wrong product will be replaced. I was like okay! Let's wait for some days and i too raised a request on Flipkart. And after * days seller has arranged a replacement for that product. I was happy as the issue was about to solve. But on **th August which was the delivery date for that replacement, I got a mail from Flipkart that due to some logistics constraints that product can't be delivered. I was like okay there might be some issue. But on **th August i got a mail again from Flipkart that seller has cancelled the replacement. I was like what is going on? Then i again called Flipkart executive and they again raised replacement request and on the same day it got approved. And this time the delivery was to be drone on **th August. But on **th of August i again got a msg stating that the replacement got cancelled as the seller can't fulfill my replacement as the product went out of stock. Then i again called Flipkart executive and explained them the whole issue then they again raised a new replacement. I asked them that now i want my refund. But they don't even listen and raised the replacement again. I mean if the seller is unable to fulfill my replacement then why isn't he issuing refund for the same.
Order ID-OD******************
I have registered a complaint in national consumer court as well.