No communication from call centre or accounts dept

I have been trying to cancel my ADSL bundle with Telkom since February. I've made multiple calls to the call centre and am on hold for more than 30 minutes at a time with no answer from the accounts department. I have tried every email address I could find as well as the complaints link on the website and still have not had a response. I am being billed every month for the bundle even though I only want to retain the line rental.<br> <br> I refuse to keep paying for the account when I no longer use the service.