Data Costs

I've been charged over R20k in 5 months for data. After the first two statements I phoned Vodacom to find out if there was a way to block my daughter from using data once the bundle was used. I was told there was no way of doing this. However an sms could be sent to me as the bundle was depleted. As yet I have not received one sms warning me of this. I was then contacted by a sales person who suggested I take out a data contract to avoid the high data costs. As per the salesperson there was no way of blocking my daughter from using data and the only solution would be to take out the data contract to reduce data costs. After the next data bill of 8k I phoned Vodacom again. This time I spoke to a consultant who actually could support customers and confirmed all info before explaining that I could migrate to another package. Firstly, if Vodacom staff were trained and knew their product I would have been saved thousands of rands. Secondly, the cost of data is ****************. I took the data contract as suggested by the salesperson and then battled for over an hour trying to register the data contract with another consultant who clearly cannot support Vodacom products.