Billing Errors

I would like to know why I am still being billed for services I cancelled in December 2015. I had a fixed-line rental (ADSL) as well as uncapped ADSL data and the Telkom Weekended package on phone number ***. I promptly cancelled this service after moving and Telkom informing me that the service could not be moved to my new address as there is no Telkom infrastructure present. Why am I being billed for the data portion of my ADSL while the fixed-line rental etc. has been correctly cancelled. How do you expect me to use ADSL data without a fixed line rental which Telkom has a monopoly on in the first place. This is sheer incompetence on Telkom's behalf and telling me to call 10210 doesn't help since no one ever answers a call and I do not have 45 minutes to wait on hold in the hope that my query will be addressed. The account in question is account number - ***