GoAir — Refund due to cancellation of flight

My flight is booked for the date of[protected] but two days before on[protected] an SMS and email I received from GO AIR that PNR U5M19S from BOM to LKO has been cancelled.This change is due to issues beyond our control.
Hence, It is requested that please refund my amount of Rs 4257/- in my bank account as soon as possible as I already informed to the ease my trip but i didn't receive Satisfactory answer and makes me disappointed and already email to [protected]@goair.in but no response from your side till date.
Please do the needful at the earliest