Can I get an itemised billing please

Good day,<br> <br> I received an invoice that I believe was incorrect. I called numerous times asking for an itemised billing that would show how I used my data and how I would have run up a bill of that much when I carry my data over every month. I explained that I do not mind paying but I need to know why and how my bill got to that amount when I do not download movies etc. To this day, I am pretty sure I spoke to over 5 consultants on this matter. Mcebisi sent through a billing but I him that I cannot open it. He then said that I should send an email- which I did- and he will resend it and I will then open it from work since my laptop was not allowing me to download the application needed to open the itemised billing. I then called again last week and explained to the next consultant that I still need my itemised billing, he told me he has re-requested for the billing and someone will call me the next day regarding the itemised billing. <br> I have to date not received the doc requested, I have not received a call from the itemized billings dept and I have paid this bill. Please advise on what my next step should be?