worst network provider

I'm absolutely livid! Vodacom has harassed me for over a year on a contract that was cancelled in 2017. Then today a consultant calls me saying I've been blacklisted and then promptly tells me to take it up with the store and drops. Now I wonder how that's possible when I am still using the very same number you have apparently blacklisted me for?? A year ago when this problem started you gave me some imaginary phone number that this R3000 bill is for now suddenly it's on my own cell phone? A number that's been pre paid since my contract expired in November 2017?? And with my usual services uninterrupted may I add. Vodacom please sort this out before the damage cannot be undone