Terrible service to a 15year plus customer

I have been a Vodacom customer for more than 15 years. I have about 6 contracts with them as we speak. on the 31 March 2024, I upgraded a contract on my number ***. I soon realized that the amount of data on the new contract was not sufficient, so 3 days later I phoned and spoke to 3 different departments, Customer care, upgrades and cancellations. I was advised to cancel the existing contract and take the desired package 5 days after. A consultant was going to phone me, which happened, and the consultant confirmed that 5 days later I should go and apply for the new upgrade. 1 month or so, the package still reflected and I could not upgrade, so I phoned again and again I spoke to the same 3 different departments and was again told to cancel and then go retry the upgrade, this time the consultant that needed to phone to confirm the cancellation phoned, but I was in a meeting and asked to be called back at a different time and that call never came, during the chat with customer services this time, they also packed up a re-occurring 10GB data that needed to be cancelled and I confirmed that they must go ahead and cancel. About 2 weeks ago, I phone back because the contract has still not been cancelled, same story, 3 different departments and the consultant at upgrades said he will reverse the upgrade and phone me back 3 days later to take out the new package, it has now been 2 weeks later and I am still on the same insufficient package and I am not able to upgrade .... my main contract number is ***