I have booked the international flight (Roundtrip) from GoIbibo mobile App. I have chosen the HDFC EMI option for 6 months to book the flight. This EMI option is No cost EMI option. After the successful completion of booking, I got the message from HDFC that your booking with GoIbibo charged with 13% interest rate. I asked bank and they said, "We don't provide such an offer, we charged as per the standard 6-month rules. You need to check it with a vendor who gives you this offer."
Why I should be charged for the interest rate as Goibibo has an offer of "NO COST EMI"