Horrible service in a time of need

Most horrific service I have ever experienced! My grandmother passed away and i have been trying to change my dlight for 3 days. The only way you can change a flight is to call the call center. I have been on hold for 45 min on the phone with no one answering at the call centers. But then they want to charge you even more if you miss your flight

WHAT THE HELL AM I SUPPOSE TO DO ?????