Your call center agent is a piece of something

I received a call from Shirley a call center agent enquiring about the payment on my contract. I asked her how much is due and there was data that was included. About 4 months ago I requested that data should be closed on the SIM card. Shirley just gave me an attitude saying that's not her work and I asked her for her surname and she told me it's confidential. She refused to call her supervisor and instead she put me through to nowhere and I was on the line for 10 min. I'm so disgusted with the service from Vodacom call center agent and I want to know what happened to the request I made that there shouldn't allow buying data on the SIM card. I have a budget and can't have a unstable amount hance I'm on a top up option