Telkom ADSL Line

I have been a Telkom customer for roughly 4 years. We subscribed for a 5mb/s line. Out of the years we have had this telkom line we had about a 3.8 mb/s line for 2-3 weeks, leaving the remainder of about 189 weeks with speeds that don't exceed 1.8mb/s. Adding to this, we have had functioning Internet for about 6 months out of a year. We are paying the quoted rates to receive 5mb/s consistent speeds every month. Furthermore, we have layed yet another complaint as our line is temperamental again, and when it does work, we are receiving speeds of 0.2mb/s. We have phoned every day, and the ETA keeps changing, it's gone from 48hours to 15 working days! I have also asked to get in contact with the manager countless times, however the manager is always busy and never returns calls! This is obsered! You are the only line provider, get your act together! Conning your customers knowing you are the only one in the business won't work! I'd rather pay more and achieve 4G speeds with network providers! <br> I want this problem fixed immediately or a refund for every month we have not received the service!