Cleartrip — Incorrect way of charging money

This is regarding Trip ID : [protected], I booked ticket via Cleartrip. I booked the ticket with Flexifly option stating that "Free date change even when switching airlines. Pay fare difference, if any."

While I tried to change the date, the customer care saying the amount deducted in the name of flexifly is insurance. And For rescheduling I had to be on call for 49min and pay some additional amount .

Also during making the payment on Cleartrip website, the additional amount is showing under cap of "flexifly", but while I received the bill over email its mentioned as "insurance".

Its a way of making customer fool by charing in wrong means.