Phone Line Fault not repaired for months

Our phone line stopped working some months ago. The line is just dead. Myself and two other staff have all reported the phone line a number of times over the past few months. Probably since about March this year. We have all received messages from Telkom reporting that the phone line is fixed when no one has even come from Telkom to look at the line. I have since started reporting on the fault and keeping track of every phone call I make to the call center - I logged the fault on 28 August. I followed up on the 4th. Someone arrived on the 12th, looked at the line and then left without telling anyone what was going on and never came back. I called again on the 17th and the fault was escalated for the second time. I called again today and was rudely told that the deadline for the fault to be handled was the 25th due to a backlog and the Technical Support lady basically just ended the call and started talking to someone else next to her mid my sentence. We are paying monthly to have this line but cannot make use of it which has caused a lot of difficutly within our organization and it has been very frustrating trying to get our line fixed. I would really like some assistance.