Vodacom bad service, not resolving issues

I have tried to update according to my upgrade date as I received an sms to say I am due for an upgrade on 30 May 2018. So yesterday there was a deal for 1 day only on the Huawei P20 Lite for R199, I tried upgrading online as this was an online deal only. After failing to do so I called the upgrade department who couldnt help me and reffered me to the online department, called them also but they couldnt help me saying there is something wrong with my account, they advice me to go to an vodacom outlet. Went to Vodacom outlet in Eastgate, they couldn't help but logged an call so that someone can call me back. I got a call from a lady, explained the aituation just to be referred once again to the same department, explained the same story again to 3 different people (online, transferred the call to upgrade who then transferred me to accounts). Once again they failed to resolve the issue after more than an hour on the phone. My problem now is the deal is over and I didn't upgrade as I was told by all this people that I am due for an upgrade. I am not happy with the service and have been a Vodacom customer for more than 10 years, this is not acceptable and im strongly thinking of changing my service provider. At this stage I wont recommend Vodacom to any family or friends.