more useless service

Every time I have an issue with Vodacom I get a different answer from every person I speak to. I called the call center on Tuesday morning to query my airtime balance and was told that my data bundle had expired and so I had used up all my airtime from using the internet. I asked why I had not been notified that my bundle had expired the agent advised that an sms was sent to me, I told her that I definitely had not received any sms and she proceeded to argue with me and then became quite rude so I hung up. I then bought another data bundle and did not receive any sms. I called the call center again and was told by a different agent that there was a system error with my profile and that no sms's had been sent to me, ever. She said that she'd log a query and I'd receive feedback within 24-48 hours, I still have not had any feedback. So now all my airtime has been used up by the exorbitant data usage rates due to an error on Vodacom's side, I don't see how that is fair and I still don't have any feedback on a resolution.