Vodacom Insurance - 3 unsuccessful attempts to cancel 3 commitments by Vodacom

I have contacted Vodacom Insurance 3 times since April 2021 to cancel my cellphone insurance. Each time I was told that the cancellation had been done. The last time I got a reference number and was also told that I would be sent a copy of the conversation for my records. No cancellation has taken place and no copy of the conversation was received. Is this total incompetence or maybe theft?? I have to wait at lease 30 minutes or more every time I phone Vodacom insurance which adds to the unpleasant experience. The frustration experienced with Vodacom is extremely high