Failure to be assisted with insurance on my two devices.

I have been a vodacom customer for more than 10 years but treated unfairly. I had two device contract with vodacom that ended March and the other one in May 2026. I was told to email an insurance document to keep my insurance active even if my numbers were now both on prepaid. I email my insurance documents about three times to them and when I call to make a follow up they say there is nothing on the system that shows my documents. I am truly not happy with vodacom services after all these years without even missing a payment i am now struggling to be assisted.