Flipkart — Wrong item sent, refusing to take back.Order no:OD[protected]

Website:

flipkart.com

Order no: OD[protected]
Amount: 144rs
Order delivered on 20th Aug 2023,
Same day I contacted Flipkart twice, 1st agent was very rude. She said, we sent the product correctly and nothing can be done.
I did not receive the product which I ordered, so again I called and the agent said we have raised a complaint regarding this and I will be getting refund. She gave me some incident no too. Now when I called Flipkart, they are refusing to take back the item and give me refund, stating 7days return policy is over. I don't even what is this, the product which I received.
If I'm getting the product I ordered, then why should I waste my time contacting these customer support people, even it is 1rs it's important to me.im not doing any charity to Flipkart