Flipkart — Harassments for return the product

I ordered a shoes of nike of Rs. 2600 from flipkart on 16 December 2022 with order id OD[protected] . I received it on 19 December 2022.But it was empty box so I placed the replacement or refund on 20th December. So this time I initiated return. And they reject and cancelled the return. Which was not intimated to me neither they show on flipkart order summary. Now I placed again return but they assign me time till 22Dec. But my return date is valid upto 29st December 2022. They are just harrasing me and wasting my time. As I waited for the whole day on till now. I want my refund and give my money back also for harrasing me mentally. Please recover my hard earned money.