Telkom messes up again

My Telkom mobile account has expired, and I sent an email cancelling it as a back up, the mobile number is still active, and they have also sent me a ridiculous erroneous account ,for this month, I have paid on time every time, but paying early for December , confused their people , and they still haven't stopped my expired contract, this reeks of dishonesty and incompetence, can Telkom not run anything properly? Why does a person always have to go to Hello Peter before Telkom even tries to rectify a problem?