Flipkart — Scam during big billion days

I ordered a suit but it was size bigger, wanted a replacement and requested for same. The exchange was rejected stating that product I had was stained. The Flipkart Customer care said that I have to cancel return request and initiate one again but when I did that there was no option for exchange. This is a proper scam as that product with the size I want is not deliverable at my pincode and no one from Flipkart Customer care is willing to help me that there are no policies for an exchange