Offline internet

My internet connection has been down now for almost 3 days, including today. I am depending on my Fibre connection, as I use it for working purposes. Now I am not able to work, and I'm still awaiting response or assistance, for my internet connection to be fixed. I was handed a case number, and have been told that I need to wait, as I will be contacted within 48 hours for the issue to be resolved. In 2 hours time, from now those 48 hours will be up and lapse it's time. Yet I've still not been assisted, and my internet connection is still offline. My case number is CAS***Q2W1D8.

This really unprofessional and highly inconsiderate.