Flipkart — return of shoes asics

1. On[protected] i selected and purchased a product (Asics shoes) order id: od[protected], from my registered flipkart id and paid the total amount of rupees 13, 999 for the product while purchasing itself. 2. Flipkart is asking and forcing me to give consent and my personal confidential documents (Aadhar card, pan card) scanned copies to get my return request accepted. 3. As a normal common man, i was also worried about my confidential documents. I don't want to misuse my personal information by giving to flipkart or other third parties. Because of this issue till now they are harassing me by rejecting my return requests and not giving refund or replacement also. 4. One thing i want to know is why are these people asking customers confidential documents for returning a simple item and making it mandatory? 5. Why should a customer need to give his aadhar card or pan card for returning the products? I was really fed up with this issue and wasting time and painful moments losing patience because of neglecting behaviour of flipkart. Thank you.