I've called them a number of times for the last three months, to fix their internet connection which seems to go down every now and then, especially during the most important meetings since I work from home

I've called them a number of times for the last three months, to fix their internet connection which seems to go down every now and then, especially during the most important meetings since I work from home. This time, my WiFi has been down for over 5 hours, I've called them no answer, tried their helpline on Whatsapp and their agents won't even care to respond. It is frustrating and the worst customer service ever! Very inconveniencing!! Highly NOT recommended!!