HappyEasyGo — Rescheduling is fraud

M trying from 3 days for rescheduling, and all they have done denying the flight availablilty.
If They have to deny for every flight then what is the point of taking money in the name of rescheduling when you are saying flight is not available. Happy easygo looting coustomer in the name of rescheduling flight option, and when you try for rescheduling they put conditions, and so called free rescheduling is a lie, in a way it's complete full proof way taking coustomer money and fooling them with their condition and terms, in the end I will say happy easy go looting coustomer hard earned money and leagal action should be taken against this way to fool coustomer.