Yatra.com - Wrongly charging Cancellation Fees

When i booked the room it was showing ***% refund if cancelled before **th April but now its charging *** rs cancellation charges.
They said its mentioned in the booking voucher but
Booking voucher was received after booking not before booking. I have clearly shared the screen shot at the time of booking and clearly mentioned full refund if cancelled before **th April. Your executive asked me to click on the i button beside service fee but as per Indian law, this needs to be clearly visible when a customer is booking. Additionally under the cancellation policy details on the booking page, there are no further terms and conditions mentioned which customers have to check.

So this is a clear case of collecting money from customers by wrong practices.