Vodacom Incompetency

I have upgraded my sons Vodacom account and made double sure that there are no hidden costs and that the amount I need to pay each month is the amount that I have signed for, which is R405.98.

First 2 months went smoothly, and all of a sudden, in the 3rd month, I get an account of R592.72. Data was activated onto my account, which I HAVE NOT approved. ISN'T THIS *****??? Vodacom's account department (Leleto) couldn't give me an answer, except for the fact that she keeps on telling me that I have requested it and paid for it since May 2022, which is not true, because the extra amount was added and then deducted on my account. (Her reason for deduction is that I have paid for it each time before my debit order went of - I wonder, did the fairies go pay that for me each time, because I most definitely didn't pay it myself) and told me to go see the people at the store, in fact, the lady (Leleto) that handled my querie over the phone from Vodocam Accounts department, couldn't even read and understand the Invoice correctly - very *********** and unacceptable and also didn't want to refer me to her manager, I wonder why??