Poor Service, still billed for a product which I cancelled months ago, device insurance

I have never received such a terrible experience with Vodacom and Finrite Administrators after over 10 years of being their loyal member. I cancelled my device insurance sometime in February 2021, I was told by the consultant that my insurance has been successfully cancelled and I will not be charged further. 3 months down the line, I am still being billed for insurance which is "cancelled". I have made several calls, the last call I made I requested a copy of my calls, which I have not received. I also requested to speak to one of the senior managers, I was told by the consultant that the managers are still in a meeting, I guess that meeting is taking days as I am still waiting for the call from the manager. That is such an awful customer experience and service one could ever get, I am on the verge of cancelling all my contracts because this is very bad for such a big company