System controlling the operations of Vodacom

I reported my issue on HelloPeter a month ago. Vodacom did respond, but that is how far we got. I have been with Vodacom since 1995, with the same number. From February 2023 I receive constant reminders that this number is due for an upgrade. When trying to do an upgrade, I get a message that "There is a problem with your account". Many calls and mails to Customer Care, Collections (even though the account is not in arrears) and promises I am still told they cannot explain the "Problem". My account summary shows that the upgrade date is February 2023, the contract end date is July 2023. When I use the SMS function to request the upgrade date, it comes back with May 2024. It is clear that Vodacom has no intention of resolving this issue. Why provide me with an upgrade date a year beyond the contract end date? I just need someone to explain to me what the problem with my account is, which answer could not be provided in four months. Definite no longer my preferred provider.