2 months 5 missed installations same excuse

Well I have been pushed to the limit, it has been 2 months 5 missed installations, from the first ADSL installation date. When the technician did show, they said that there was a fault at the exchange and therefore they could not install. <br> <br> I have been calling Telkom countless times asking them to fix this issue, every time the sales informs me that they will query this and the technicians will call me in no less than 48 hours. This is in-fact a lie for the technicians never called back. Even now if I ask for a manager the sales does the following: 1. drop the call