No internet, no customer service

I have battled for months now to get Afrihost to sort out my slow/intermittent/non-existing ADSL. They repeatedly pass the buck - \it's Telkom, it's your router, etc\" - none of which is true. Telkom came out and said all is in order, and I even bought a brand new router, which was completely unnecessary. Spent an hour and a half on the phone to them on Saturday, ran tests, determined that the problem is on their side. Said they'd call back, they didn't. I queried again on Monday. Said they'd call back, they didn't. I complained on FB and Twitter - got banned on FB and told on Twitter that other than requesting a call back from their tech support, there was nothing else they would do for me, followed by a \"cheers\". Predictably they didn't call back. We pay like clockwork every month and Afrihost takes our money. But I haven't had proper internet service for close on 5 months now. And I see I am not alone either. I can't imagine that there is a worse ISP in South Africa when it comes to its ADSL network and it's customer service."