Telkom are happy not to cancel

I emailed the cancellation form to Telkom, as required, because they do not let you phone anyone to cancel or to follow up on a cancellation, on 30 November, and 1 December. I received automated responses, so I know they received them. I was billed for January and a debit order went through. I lodged a dispute both through the call centre and online, and the call centre said they could not help me with the cancellation. I emailed the cancellation again on 19 January. Again I received an automated response. Today I've received another invoice for February. I logged in to check on the dispute, and there is no record of the dispute I lodged online in January, only of the one the call centre agent lodged, which is for some reason for far less than the amount I was billed. Nobody has contacted me to deal with the dispute, but on the website it is recorded as \rejected\". With no reason. Again I've sent the form and lodged a dispute but it seems to me Telkom has no incentive to cancel my line, because they can just keep *****ing my money, and when you try to speak to anyone they tell you it's not their department. In the meantime they get money for a service that's not being used."