Never expected this from vodacom cancellations

I have been vodacom for a number of years and never experienced this before. I just gotten very very frustrating now.

I cancelled my LTE contract early in November and had to pay the cancellation fee. Two months later im still being billed and when I call the cancellation numbers, either its not answered or the person that is supposed to assist me says its cancelled and then im back to just paying for a service im not using. Emails are just responded to with just call the service center or use the tobi chat bot