Paying for a canceled cellphone insurance

I have recieved the worst customer service from telkom. On 13 July 2021 I called in to cancel my device insurance and on the 14 July 2021 I recieved an email with an attachment stating that my insurance has been canceled. I also called in to verify and they confirmed that the insurance has been canceled and the last debit order will go through in August because am being debited in errors. To my surprise I recieved my invoice for September and it included insurance I called in n i was requested to to send proof of cancelation n i dd then I recieved an sms stating that the matter has been resolved. I called in last ween I was told that according to their records I only canceled my insurance on the 6th August 2021. I was assisted by Lerato Mngomezulu who then told me that she will send communication that the debit order for insurance should not go through since then I have been waiting for feedback. Today telkom did wat they do best they debited the insurance that has been canceled basically i am paying for something I do not have. I also noticed on my invoice that there is an added product that I do not know anything about. I am really frustrated by all this. I am just hoping to get resolution for this matter.