Worst ISP in South Africa

I've been a customer of Accelerit for little more than a year. While I was very impressed with the speed with which they got Vumatel to install my CPU, it took them 4 days to get me connected to the internet via their servers. However, I gave them leeway since they were new to the ISP market and I believed that with time their services will improve. Today I must admit, they've been getting worse by the day. They sent an email at 7h45 to inform you they are doing maintenance on their system from 9 to 12. Who, in their right mind, does that? By 15h45 there's still no internet. I logged a ticket using expensive 4g data. At 16h45 they have the audacity to email me for a review of their "service", but still no Internet. Looking at the ticket, they claim I have an outstanding bill, meanwhile my invoice is due the 1st of October and I have already paid it on 23 September via their invoice payment process and they emailed me a receipt. I'm sure the sum total of the IQ of everybody working there cannot be more than 50. And even that is being generous.