Flipkart — Online scam. Delivered a wrong product and not accepting for return

I ordered a 32L convection microwave which costs 15000 rs. But they delivered 10L basic microwave. I tried to return the product multiple times in the app, but it's always throwing an error that return cannot be placed. Customer care is not responding properly. even mailed to Flipkart's grievance officer, there is no update.

I am not able to add this in product review. they are not adding negative reviews.

This is how they are looting customers