worst service

I would prefer to award Vodacom no stars at all. I app**** for an upgrade to my contract in September 2023. They came to deliver my phone without contacting me prior and I was not there so they took the phone back. However, it shows on their systems that the phone was returned but they have never reversed the upgrade. I have phoned at least 17 times since September 2023 and they keep telling me that they will escalate the problem and it will be sorted in 24 to 48 hours. I have emailed customer services over 300 times. I have been told that I can't cancel my contract because it registers that I have an upgrade and my contract only ends in 2026. I complained on Hellopeter and vodacom called straight away and sorted out the reversal of the upgrade so that i am now eligible for an upgrade but every time i try upgrade at an istore it now shows that i ordered a phone through vodacom online and i still cant upgrade. i have called vodacom 3 times about this issue and they say its sorted and i can go to istore and upgrade. so i go and they show me the same message that i cant upgrade because vodacom has not cancelled my order