Bad customer service

I've been a Vodacom customers for over 10 years, this was my worst experience ever. I upgraded in June instore, the lady who assisted me informed me that the Sim card I'll recieve is an open Sim card, I need to call customer service as soon as I inserted the Sim card and it's activated to block it to R0.00 not to recieve a bill at the end of the month. I have done exactly that, now I recieved a bill with a huge amount and logged a query on my invoice on the 7th November 2024. Upon logging this query I recieved a reference number which this person told me that he can clearly see that the blocking of voice calls is ticked but not for the data, so the person who assisted me didn't do what I requested now I'm liable for this invoice. Now I've n been send from pillar to post to get it resolved. Why do thay say all calls are recorded when you contact them, but now when it comes to resolving your issue they take forever. I have to call them all the time to follow up.