Outrages data charges, get no real help

My account with Vodacom I have 5 devices i.e. 2 cellphones, 2 tablets & don gal. My monthly bill was +/-R3,800 for all 5.On 30Nov15 the d/o increased to R4,700. In the midst of school exams and not receiving a statement yet, I planned to investigate over the holidays.On 31Dec15 d/o R11,100 (twice, double debit error) I was sick. Still I had received no statements since Oct15.I emailed Vodacom, they send bills via email - reason for huge increase was data usage only per one ipad. I emailed the analysis of my accounts for the last 7 months pleading for assistance. No response. Eventually phoned customer service, agent indicated I should put a limit on the account. which I did for R50. Received disclaimer for R200 (now also excl VAT?) He sent history to the back office. An agent phoned. He kept at it to educate us on data usage rather than at all trying to assist in a bill I cannot afford to pay.To my horror he said that Dec usage is already at R9,000 (with a smirk). Surely this cannot be legal under the consumer protection act? According to the agent notifications were send for me to buy bundles - to the cell no of the ipad sim (the ipad cannot receive sms's). I am desperate.