Bad, Bad Service!!

I have been trying cancel my landline for over a month and what a challenge! I paid the amount outstanding that I was told to pay. As a result I was unable to upgrade my mobile which has been overdue. I try to upgrade a month later, but can't as the landline is still showing an outstanding balance? I ask for a final amount outstanding , and paid that. Can I now upgrade and is it finally settled? No! I had to lodge a billing dispute. They acknowledged that the line ought to have been cancelled a while ago and sorry , that's all you get. By the way there is another outstanding balance ( the phone is not used at all). Never ending story!! If you thinking of opting for Telkom, be prepared for this to be the service you get.