Flipkart — Return not picked up. Return window closed

I have raised return request on an item 3 times and it hasn't been picked up yet. Not getting call back from support team. Same thing happened for two items last month: the return window closed & i had to keep 2 defective products. In the latest return request, it's been 48 hrs and i got no call, no one has so far come to pick it up. This is repetition of what is happening with my previous 4 return orders.. i raise multiple requests they delay and then the window closes.
Now Flipkart owes me almost 4k in return and have to pickup the poor quality products.