GoAir — Unethical behaviour

I booked the flight but it is CANCELLED.
I got mail, "If you wish to avail the option of a FULL REFUND or a FREE REBOOKING we request you to call us on [protected]/[protected], up to 2 hours prior to departure. "
In first time when i called to the customare care then she also confirmed that date is flexible and then i told her i want to reschedule the flight but will confirm you later.After few days back i decided and planned to reschedule it on but this time they are saying free rebooking is not possible.

while in mail it is clearly mention about free rebooking upto 2 hrs prior to departure.