Poor Service providing

for 12years I have been complaining about my Telkom line. I have paying line rental and had the technicians visiting and checking the line and giving the same report that the line needs to be replaced. Still nothing has been done. I have been a client for Telkom for more than 20years. There is no more accounts that is being send and I have been paying my account as per the average I always pay. I short payed my account R105 but most of the time I am in credit because I pay more. I got a sms to say your account has been suspended. this sms did not say from who or what I tried to get hold of Telkom to see why my wifi is not working to find out that the sms I received was actually from Telkom. You can not get hold of nobody on the internet nor the land line. This is frustrating paying for a service and get nothing. There is people that owes Telkom thousands of rands with services not suspended but with a line that is not working and I have to pay for my services get suspended for R105.00. If you work out Line Rental at R280.00 p/m x 12 x 10 = R33600 which is actually owed to me for being a patient client because a line is not working.