Flipkart Internet Private Limited - Phone not get exchanged

I ordered the realme x mobile with an exchange of old Redmi note *. The courier boy came yesterday for the same. He denied the exchange just because of the two-minute scratches at the back panel of the phone. This thing was unjustified as on the back panel minor scratches would be thereafter used of * to * years of the phone. But he denied saying that the company says there should be no scratches at all. Then he said to me that some other boy will come on Sunday for the same and he might accept the exchange. The on today (Sunday) no one contacted me at all and I got the message that the order is cancelled and the refund has been initiated. Even if you people do not want the exchange, then also I should have been given an opportunity to pay the amount of exchange phone and take the new phone by paying the full amount. This is a hell of service from Flipkart's end. If I do not get any resolution from here, I will lodge FIR for fraud against Flipkart. I will not keep quiet for this cheating.