Not quite. I have their legal team harassing me and black listing me etc after 4 years. The issue never goes away and the costs keep piling up..
On the second year I just gave up and payed them full amount + penalties etc etc and it still made absolutely no difference.. the saga continues
Telkom would not cancel my account even after my contract period ended after numerous attempts so I stopped paying. They handed me over to debt collection and started legal action against me. In the end I had no choice to pay with all the penalties added.
Correct thing for them to do is be honest that they stuffed up on price and point you to where their terms state its OK for them to cancel your order under this condition.