cannot resolve my billing challenge as one cannot speak with a human being at WebAfrica

The worst company to try and resolve a problem with. You cannot speak to a human being. Their chat bots are never available and it is literally impossible to resolve a problem. They are great as long as nothing goes wrong. I have been having a challenge with my line speed for about 2 months now. I have given up trying to fix that. I recently moved house. I have been over billed. I cannot have a conversation with someone to resolve the overbilling. I have also been charged for a router that I returned before the 20 day deadline and cannot resolve that either. So am R2000 out of pocket with no resolution in sight. I am unbelievably frustrated to the point where I want to cancel with them