Paying for cancelled sim card

In a previous review I complained about the bad service from customer care. Cell C contacted me immediately with a lot of promises but nothing happened. I’m still paying for a simcard that was cancelled last year. I also paid for sim swop and reactivation that according to Theodorah of Cell C is ***** because she listened to the recording and it wasn’t my voice. Now I ask one question: If a simcard is cancelled then why am I still paying? Whenever I contact customer care they cannot help me because they put you through to 5 people who still can not help you! I’m tired of phoning and emailing and no results.