Cell C consultant cancelled wrong contract

I called cell c last year July to advice them I wont be renewing/upgrading my contact that was ending in August 2020. The consultant went and cancelled the wrong contract that was only due to end in late 2021. Now they are busy pumping data and minutes to a number that I nolonger have as I was under the impression that I cancelled that number I lost the sim card. They are busy billing me for something that I'm not even using I'm already owing over R800 because of their incompetence. What a disappointment your consultants are after making numerous calls and sending emails in November 2020 not once was I responded to. I'm not going to leave this, I'm going to put your bad service on all media platforms.