change in flight due to death in family

I purchased a ticket from Cheapoair flyng via China Southern flying to Manila. I called CheapoAir to change my flight due to an emergency about my wife Mom in critical stage but Cheapoair simply referred me to China Southern. Turns out it is closed on wekends and unable to get anyone to talked to about a waiver on fees for changed of flight. We got a call from my wife sister that her mom passed away 2 days later. Does anyone have any dealings with China Southern about these types of scenario where i can change my flight sooner and fees are waived due to emergency.Help