Faulty line on Medical Practice Business

I am so fed up with the poor service from Telkom and am seriously looking at other alternatives. I have been with a dead line for 2 week now. I have phoned daily and every time they either say it has been fixed or give me a new ref no. Not once has there been a technician to my practice to attend. Apparently everything gets done remotely! And to make things worse it all started with me adding a 4th line? I am supporting them with my business but they are costing me mine??? I am sorry but this is not acceptable and like I said if anyone knows of other telecommunication service that I can use for my business please let me know.