Not picking my return product

I ordered kent supreme IoT water purifier from amazon on 06/09/2026. Not working product was delivered. Then I called them and asked for replacement. They said replacement not available but we can return and refund. I said ok for that they interested a pick up slot for 25/09/2026. No pickup person called me and he updated the pick up slot for 03/10/2026. But on 3td of October also no one called me and pick up slot updated for 06/10/2026. That day also no one called me for the pick up and updated for 09/10/2026. That day also no one called me for the pick up and updated the slot for 13/10/2026. Same thing happened and updated to 16/10/2026. Same thing happened not it's updated for 24/10/2026. When I called to customer service and asking about my issue they people are behaving rudely and saying we can't do anything.. you should wait if it is done after 2 years also. Literally I lost my patience. Kindly help me on this. Please..please..please...