How do Vodacom bill????

Second review for billing from Vodacom. First issue was resolved. Well now I am not sure that I am pleased with the first issues resolved...... Now for the second month I get billed for what?????

I did phone Vodacom yesterday and the lady said she will phone me on Tuesday as she is not able to help me at this stage because the bill is not finalised yet. Which I do understand perfectly. My reason for this review is my Mobile data was switched off the whole day today!!!! Now I see my bill went up another R20 since yesterday, thank goodness I took screen shots?? Where is this going, why should I get billed for somthing I didn't use? How do you bill us? All this whilst I am still having data left, minutes and sms's? I really do not understand. At this stage I am really tired of Vodacom!!