The order was defective

I ordered a product (OSCAR) through the Flipkart app. The product I received is defective, so I tried to return it through the app, but the app is not allowing me to place a return request for this order. After this, I contacted Flipkart customer support by phone to request a return. However, the customer support executive also told me that this order cannot be returned. I am not satisfied with this response since the product is defective. I request that my return request be accepted and processed, and that I be given a replacement or refund for the defective product.