ADSL Installations engineer does not show up for a second time

I ordered a 10 mb uncapped internet connection from telkom, very friendly staff in store at cape gate. Got the call last Friday that my installation will be done on Wednesday, Wednesday comes and goes, no feedback or notification what so ever from call center or engineer as to what is going on or why the installation cannot take place on Wednesday. I phone them on Thursday and ask what happened, apparently the workload was too much but a promise is made that it WILL be installed on Friday(today) at 9:00. Again I wait and nothing happens, so I phone the call center again only to be told that they could not specify a time but it will happen today, I am marked on their list as jobs for today. I wait some more, still nothing, the afternoon I phone again, was told the same story but now they will escalate the matter and get someone to do overtime to come and install it, now however the installations engineer that works in the Brackenfell area is not pickling up his phone and cant be contacted in any way! It is now 19:26 and still nothing has happened, I guess the engineer that doesn't do his work in the day is not very interested in overtime either, maybe because it is Friday he or maybe the whole Brackenfell team has been drinking since 10 AM, who knows??

Really Telkom?? Is this how you treat new customers?? This is by far the worst service I have ever had, when will my line be installed??? Who else can this be escalated to?