Internet down for 2 weeks!!

We called the Telkom call center on the 23rd of November to report a fault in our DSL line - a technician was assigned to us for the Wednesday - I arranged to be at home (had to put in leave at work) and yet no one from Telkom came that day. After that we have been phoning daily to request that someone will come and fix the problem, at last they said someone will come on the 6th of December at 12:00 - we were away for the weekend and had to make arrangements so that someone will be at our house when the technician comes - and AGAIN no one came!!! We are still without internet and no one can tell us what seems to be the problem!! When talking to a call center agent, they merely state that on their side they can not do anything but they will escalate the problem to the technical department - which clearly does not help. If Telkom can not handle the work load they must appoint more staff or stop selling a product to us without ANY service!!! We would rather cancel this service than to pay for something without any benefit!!!