Useless service

At the beginning of October 2015 I ordered the unlimited 3g summer promotion from their telesales team because the local telkom shop was closed down. They told me that I will have my device and Sim within 7 days. A month and a half later and after a lot of hours being on hold phoning them I finally received everything. I then made the mistake because of waiting so long to getting the sim rica'd locally which caused a problem and except that. Now to fix it I launched a case and was told it would be fixed within 72 hours. It is now two weeks, a bunch of long on hold calls later and buying a new sim because my original one was registered under someone else's name and I am still not connected. 3 people have promised to phone me back by now and I am still waiting for those calls. My things have now been at the back office for 4 days which should apparently mean that I should be connected within 24 hours. I have never in my life experienced such bad service. I am fed up and will be cancelling the deal this week