Poor Internet Connectivity

I have been with WebAfrica now for couple of months. I have a 20/20 internet line (fibre) and everything has actually been okay until 4 days ago. My internet speed just drastically started being slow, I cannot even open a simple webafrica page without waiting for over 2 minutes for the page to load... I have tried everything up my sleeve to resolve this issue but nothing so far has worked for me... I have on multiple occasions tried to contact their support team both on WhatsApp and over a phone call but I haven't had luck except of this one time when I was able to reach one agent on WhatsApp but our conversation was cut... I work from home (full time) and this means for the past 4 days I have not been able to do my job nor run my business except of the times when I have to hotspot from my own mobile... I am quite not impresses with their customer service and if I had any other option I would seriously terminate my contract with them