Line down after it was fixed

I am so fedup, we have been reporting our line now the third time, it is noisy and the internet drops every few minutes, yet we get billed for the full line rental, it has been dead since sunday, and we could only report it today, the issue is it works for a day or two and then its noisy and starts all over again, this is going on and on ... I am looking at other wireless options now but its limited. I cannot understand why a line cannot be fixed and stay fixed for longer than 6 months becuase this is our issue - there is ALWAYS something wrong on the line. When we receive a call the internet drops thats been lie that since we had the line 5 years now. I hope we get another service provider in SA!