Disappointing issue

I am very disappointed at MTN. I had an account from July 2019 to July 2021. After my account ended in July 2021, they continued deducting R55 until September 2021. I called them to find out why and the consultant told them that I needed to cancel my account and the cancelation department was only working on Monday. On the following Monday I called them and a consultant told me that she made a request for my account to get canceled. Since then they stopped deducting from my account. On 03 January they deducted R231.50, I made a call asking why and their consultant apologized saying that there was no sign that I have an account with MTN then I told her that I was going to reverse that transaction of which I did. Last month I received an SMS from CDC stating that I needed to provide proof of payment for R353. I also received a call from someone who said my MTN account was handed over to them, when I ask for the reason why, she said there is no reason on her side. This morning called MTN help desk and a lady told me that she is unable to view a trail from my account because it is already handed over to legal. I just want to know, why am I owing MTN.