Overcharged

I have a Wifi with 2gb contract. my account is normally between R150 - R250 per month<br> suddenly i get invoiced for Oct and Nov with over R1800 and R1900 each<br> obviously something is wrong, so I query the bill<br> after 2/3 months, a certain Dyllan contacts me and tell me that I created this bill, and I must check downloads on my phone and pc etc etc<br> I asked for itemised billing - and received something that doesnt make sense at all<br> so I ask vodacom - if you send me a bill for 5x the amount I pay normally - then you must be able to proof all the data usage etc to get to that amount 5x what it normally is<br> so I wonder by myself if Vodacom will do anything about this, or will they just continue giving me useless answers<br>