vodacom poor service

I was called by a vodacom consultant that my phone is due for upgrade ( 30/08/2018). I also received a massage from vodacom that am due for upgrade (30/08/2018)

But when I went to vodacom shop The Heads Shopping Center today(12/09/2018), I was told that i cannot upgrade my phone as am not due for upgrade, but still again today(12/09/2018) whilst i was at the store i received a massage that m due for upgrade but still i couldn't be helped. I called customer care still I couldn't be helped. I am very disappointed at poor service and customer care from vodacom I have been on vodacom contract for the past 8 years. I am even considering switching to other reliable networks.