Logging faults is useless!

We have had a Telkom ADSL/phone package with Telkom for almost 2 years now. Our line has been down a number of times in this period for 1 week, 2 weeks, 3 weeks at a time. We log a fault with the business fault no. 10217 and on the website and specify we want a technician to come to our house on Tuesday or Friday as our housekeeper isthere on those days and ask that Telkom phones us the day before to arrange access at the main gate. They have now arrived every other day accept Tuesday or Friday -i.e. Monday, Wednesday, Thursday and set me a sms that they would be there on Saturday 9 Sep between 8am and midday and never arrived. The last time we had a fault with the ADSL line the same thing happened and we had no internet for 3 weeks and it came back on eventually then Telkom billed us saying it wasn't a Telkom fault!!! They want a full payment at the end of the month even though you haven't used the service!!! The more we complain they just ignore you and all you get is sorry and they "re-log the a fault" and the same thing happens again and it doesn't get fixed!!!!