Worse service ever

I have an account with Vodacom with 4 devices linked to it. 2 Of the devices are due for an upgrade now, but when I checked the one it shows that it's only due for an upgrade in 2028 which will make it 5 years without a new device and the 1 that was upgraded last year showed that it's due for an upgrade. I called them and they insisted that I did the upgrade last year, online even if that device was not due for an upgrade. How can you upgrade a device if it is not due. They are not helpful at all to rectify the issue on their side and just advise me to do the upgrade on the other device. I don't want to do that as the records will be mixed up. Today I checked again and now only 1 device is showing as due for an upgrade. This is now leaving me with 1 device that was not upgraded for the last 5 years. I am a client of Vodacom now for many, many years and the service is just getting worse and worse. You spend so long on calls with them, and they still can't get it right and the only way to complain or get a supervisor or manager's attention is on Hellp Peter.