Vodacom
Itimised billing

I received an invoice for data usage for a ridiculous amount.
I recently upgraded from a 1.5gig to a 5gig contract, but then received an invoice that surpassed all of my data usage up to now, so I phoned Vodacom customer care on 082 111 and spoke to a gentleman, he was adamant that I had definitely used more than my 5gig for the month of October, as they do back billing.
I disagreed with him, and he said that he could view the data usage on his screen, so I asked that he forward me the itemised billing, he took my e-mail address and said that he would be forwarding it to me.
After 25 minutes I had not yet received the email containing the itemised billing, so I phoned again.
This time speaking to a lady, who then informed me that they do not do itemised billing via e-mail, I then asked to speak to a supervisor or senior, who told me the same story, and that if I would like the itemised billing I should send a fax requesting it, for such a modern company to not be able to email me my itemised billing? the reason being customer privacy. I am the customer.
I have asked for itemised billing before from Mtn and Nashua mobile and also received it via email without any delay or faxes.