Poor speeds and cannot get through to tech

I have had Fibre for a week now. I can't make watsapp calls as it disconnects me saying the signal is bad and this happens every few minutes. The line is bad quality as well. The person on the other end can hardly hear me and is always breaking up. I lose signal completely if I move slightly down my passage. My daughter get signal in her room for a bit then it cuts off. My husband did a speed test and it does not reflect the speeds we are paying for. I have tried to call tech support however sat on the line for over 40 minutes without someone even answering so I had to put down. There is a watsapp support number but u never get to speak to an agent even though that's is what you have selected. So far very shocked and disappointed with Webafrica