Poor service and one sided billing approach

I am SO frustrated with WebAfrica and will NEVER recommend them ever again to anyone... They were more expensive at some point with a price adjustment, at which point I cancelled them.. Sales then called and stated they will bring down my agreement to keep me as a customer. I agreed.

Now on Friday they just sent me a mail stating I will in my next billing cycle (2 days) be billed more. Now, trying to cancel this - I have been trying for 2 days to get hold of them, currently on the phone for the best of 42 minutes waiting to talk to someone - AND now I have to return the unwanted router which is 4 years old and they STILL want to charge me R999 for it if not sent back in time - they also don't want to release the line if I settle my account so that there's no downtime - it's just SUPER POOR service - I will not recommend WebAfrica as an ISP