Flipkart — My product was picked up but I did not receive a refund

My product was picked up on 4th April by a delivery agent who confirmed the integrity of the product which was unused and had its tags intact.
However I later received a message stating that my order was not picked up due to damaged product.
I have been contacting customer care service ever since and at first I was told that this was a technical error and that they had it in their system that my product was picked up. I have called them at least 10 times and always I receive the same communication and later a msg that my order was not picked up. I have cameras at my place which would even have a footage of my order being picked up.
Its so ridiculous that they cannot even track a product being picked up. I don’t even have my product and neither the refund. I would have been fine if I at least had my product.