Use Telkom at own discretion

I signed for a 10 Mbps line and it was installed a week ago on Thursday. Since then I have never had internet and the phone doesn't work at all. It's been a week and I paid installation service for something that's not working at all. I have spent lots of airtime calling them and every time they lie that someone else is going to call you back. They expect you to pay again at the end of the month for no service?