Vodacom and its poor service

I had a contract with Vodacom which started in (August) 2017 till 2019, the device was also insured and as it becomes due for an upgrade, I was called and offered a new mobile data plan. I accepted the offered as I didn't want a need device however I asked the consultant whether the new plan would affect my insurance on the previous device and I was assured that it would not, meaning the device would still be insured. Earlier this year I received communication that the insurance premium would increase as a result of inflationary measures. I took the insured device for repairs and was told the device isn't insured, I further provided statements indicating the billing of the cover but I was sent from pillar to post for over a month. Consultants continuously promised to call back as the matter had to be but this never happened and the device hasn't been repaired. I'm very disappointed in the quality of service I observed and if asked at any instance I'll discourage anyone from using Vodacom.