Bad and unexpected service from WebAfrica

I am super tired of struggling.

for the past 3 weeks I have been struggling with my Fiber internet. everyday at random times the internet would be so slow that I cannot even watch a 270p Youtube video on my phone. when I first contacted the support team (via Whatsapp, witch is also another big complaint from me) they asked me to change my router settings from PPoE to IPoE, after another few days of the internet going down like this and contacting the support once again I was told to change my Wifi settings so that my 2.4G and 5G networks run separately and not together, as they instructed I changed those settings however that did not fix the issue, once again a few days later I contacted the support with same issue and all they did was do a reset on the fiber line and asked me to turn off the router and fiber box on the wall and turn them back on after a few minutes, that was done but the real issue has not been fixed, Yesterday I contacted the support once again and again explained the situation and problem and I told them that I noticed usually the internet goes down or extremely slow at 18:00 and they said they will call me back at that time to see what the issue is, however I never received the call. Today again and a lot earlier than usual the internet went down again. I am truly done with this issue.

My next complaint is the fact that the only way to contact support is via Whatsapp. there is no other way to contact them, when I do try and contact them via whatsapp when the error above occurs I usually have to wait about 3 to 5 hours before someone gets back to me, sometimes I even wait 24 hours before I get any response and by that time the internet is back only for it to happen again a little while after I spoke to the support agent and around we go, I need a proper contact number to call for when the issue pops up so that I can speak to someone immediately to fix the issue.