Telkom billing complaint

I took up a telkom contract on the 15/03/2021. Later got a call from one of telkoms agents offering me insurance of R83 and a few cents a month. Whi8i agreed to take up since I had taken up 2 devices with telkom and felt that the bill would not be so steep since I had a budget I did not want to exceed because it's all I could afford. When my telkom bill came I was charged R120 per device with Telkom insurance and after 2months of trying to get through to an agent to cancel my cellphone insurance I was eventually told by the operator I got through too that I needed to send an email to adminplus who deals with the insurance. I sent my email cancelation request on the 21/06/21 and was told that I would get my last insurance bill generated at the end of June. To my surprise I was debited again in July and when I called about it a case was logged for me and closed within a week without a resolution. I wa told to review the case in 3-7 working days. The case was logged on the 03/08/21. And so 7 working days later I called back 13/08/21 to be told that my case was closed on the 09/08/21. I received no email, phone call or any form of communication from telkom and when asked the operator what the resolution provided was he merely said the case was closed without a resolution. I have since received another invoice which contains the insurance amount that I had canceled in June. So telkom sold me incorrect insurance and are now billing after I had canceled the insurance none of the operators seem to know what they are doing. They either drop you when you call then or tell a bunch of lies. I wa provided with an email address of one of the managers whom I sent an email too and when I tried to do a follow-up later on the email bounced back the manager whose email I had been provided with did blocked me from his mails. I am disappointed in the atrocious service I have received from telkom and really regret ever taking up a contract with them by far the worst service ever.