Accidental damage insurance activated on my account without my permission by Vodacom

I am so done with Vodacom and their bad service. I cannot wait for the day I can cancel my contract and move away from Vodacom. I have a sim only contract for R39 a month. I tried canceling the contract but they wanted me to keep the number, which we don't use daily, and i decided to keep the number. Now they have gone and activated an Accidental damage insurance on the sim. I have called in 3 times now and the activation fee of R326 is still not cancelled. Last month i was told to pay what i normally pay and they will cancel. A month later still not canceled, instead my account is in arrears and this is now affecting my credit score. I hold for long, being transferred from one department to another and at the end of that call your issue is still not resolved. They keep saying the system activated the insurance but it is failing to cancel it. I am very unhappy with how they handled this whole situation. I have been with vodacom for almst 10 years now but the service i got this year is the worst ever.