Service Failure

I have a contract with Vodacom. Phone i bought as a gift for my God daughter. A huge amount was deducted from my account close to R3000. I called vodacom to dispute it January and i was told she bought data using my contract fair enough. I then asked them to cancel all these services and keep it at R50 for transactions. Now i see that im about to be deducted R2000 again for February because the first lady who assited me reassured me it wont happened again since she can only use R50 but didnt mention that she took recurring data. The consultant failed me dizzmally and i wanted something done about it as im about to take further steps.