GoAir — flight got cancelled by airlines still no refund

On 26th dec go air flight was cancelled from delhi to hyderabad at 5.30 am by airlines and i got a got about it. I said to refund the money and the person said ok after that i dint any cal or message saying refund initiated nor received any. I caled and emails all the possible numbers but no response.. I need my money urgently. I have called them so many times but no one picked the cal. Even caled to free number but no one attends the call.