Terrible connection and service

Afrihost took a week to come and install. When I took out the contract I explained that I'm ruining several devices from the the fibre which includes call Centre work and I need a clear line with my clients. It was said that the 40meg will be more than enough. The signal for fibre was absolutely terrible and I sat an entire week for hours on the phone where they did speed tests, open serve also check if the problem was I t whir side but clearly it is with afrihost. They advisor then said I can try a 100meg line which I did and still in week 2 the signal is absolutely terrible. The lines keep cutting and I have never experienced so many problems. I have tried canceling because clearly this is not what I asked for and my previous wifi was WAY better even with their signal cutting every now and again. No one is returning my calls to cancel and refund me. I've been begging for the past 2 weeks for assistance and spent endless time on calls. Their call centre's are slow and takes a day to get back when I call I have to wait 40+ minutes before someone answers. I just want to cancel and now they have stories. I'm losing moment because I cannot service my clients from home due to their horrible service and terrible fibre line. I STILL HAD NO FEEDBACK for my cancelation. I think it's disgusting to lie to a client.