Made a FULL DAY appointment and didn't pitch!

I had an installation scheduled for my ADSL with Telkom. They said I would need to avail myself for the whole day. So, I worked from home, spent hundreds of Rands tethering to my phone while working (because it took them weeks to schedule it anyway!), and it's already after 16h00 and they haven't showed up. I called the call centre just now and after ages on the phone, all they could tell me was that the person installing my line would be there \between 07h30 and 16h00\". Clearly not! Well, what now? Can't afford to take another day off work, so what do you suggest I do? Also, the ****py software on your ****le doesn't even work on my laptop so I couldn't even use that! Terrible service, once again, from Telkom. And this was after they didn't cancel my last account in JHB and I ended up paying months too many for the line. Avoid them at all costs. "