MWEB are a bunch of ******!!

Despite having cancelled my MWEB subscription on the 23rd of August, I am still being billed in excess of R800 per month!! They acknowledge that I called on the 23rd of August but "cannot find" the email that was sent to the cancellations department despite me emailing them proof of my email. MWEB are nothing but a bunch of ****** trying to squeeze a few more months billing out of their customers under the guise of "faulty email servers". I have called on numerous occasions trying to speak to someone with a brain and the power to sort this out but to no avail. They say that there is usage on the line, even though I moved out of my retail space at the end of September and have the router with me!! The retail space has now been let to someone else, so how can I be billed for their usage despite all my communications!! To say I am frustrated doesn't even begin to explain it!!!