Telkom offering the worst service

We have gone through various issues with Telkom, my mother has engaged and pleaded with them for years, from everything from huge bill mess ups to faulty landline. When issue gets sorted, something else goes wrong and so the never ending battle with Telkom starts all over again. The most recent issue has been a faulty landline which has given us issues since June 2017. There's a constant cracking sound meaning you can't hear the other person, other times, there's no dial tone at all meaning you can't receive or make calls. Service providers have come, they 'fix' it, but not to 100% and a week or two later the phone is as bad as it was before it was 'fixed', if not worst. The poor landline issue slows down internet which we have with Afrihost. Recently our landline completely died, which means no internet. This is frustrating because I am a part time student and free lancer, most of what I need to for school and income is online, so Telkom's inefficiency is now threatening my livelihood. We have called Telkom several times, they promise to send someone to fix the issue and they don't, usually they aren't even clear about the time the person will arrive. Between work and life, no one has time to wait around home all day for a possible no show. We are reaching our last nerve. FIX IT!!!