Billed for services I did not apply for

At the start of February I app**** to have my adsl line activated for internet services and intended to take out a data package from Afrihost. After a three week wait and two rescheduled appointments with the technician my line was finally activated. I took out a data package from Afrihost and my internet was up and running. Now I have received a bill for Telkom Simple Basic Uncapped of over a R1000 which I most certainly did not ask for. The lady who helped me at the Telkom Direct shop in Potchefstroom, Sinah, obviously made a mistake and now I've been billed for a service I did not ask for and am not using. I had hoped for better service, but clearly your staff are not up to the task. I hope this can be rectified as I am not willing to pay this bill.