Missed appointments and I'm struggling to cancel

I need a new line installed. I called Telkom, and a couple of days later I received an sms with a date when they will come install my line. I took off from work. They missed the appointment without letting me know or rescheduling. I've been on the phone for an hour a day trying to find out what is going on, with no luck.<br> <br> Now I want to cancel my request, but I can't get through to the department that cancels my request. I have found a more reliable alternative and need to cancel my request.<br> <br> Really bad service, my lines get dropped, I get passed from agent to agent.