Complete disregard for customers

I work from home and have both a landline and ADSL service with Telkom. For the past six weeks my ADSL connection has been dropping - sometimes up to 100 times a day. More recently this stopped working altogether. At the same time, my landline stopped working. I have phoned the Telkom call centre at least 30 - 40 times to log a fault. Inevitably I would receive a confirmation SMS but nothing happens. I have been told by Telkom that it is a line problem and they have promised at least 10 times to send out a specialist technician. Despite numerous promises, I am still waiting. Consequently I am unable to work at home which is costing me money. All I want is a technician to come round and sort out the problem. It is without doubt the worst service I have ever experienced and I honestly don't know what to do to get the problem resolved.