Massive account with no explanation

Received a bill from Vodacom alleging that I've used 7.4Gb or R9,000 worth of data out of bundle on my contract. The itemized billing only shows a single item at 6:46 in the morning when I was sleeping.<br> <br> I asked for Vodacom to investigate and provide proof that I did use this data.<br> <br> Couple of issues here:<br> 1. I have a full 10mbps adsl line at home so there is no reason for me to rack up such a bill on my phone<br> <br> 2. You only notified me that I'm out of bundle on the 08th at a value of R3,000 which is far past my registered notify me warning, this is also why I stopped using the phone as much as possible. Look at the records between the 08th and 18th.<br> <br> 3. Considering my regular use why did you only block my phone at R9,000 on the 18th. This should have been picked up earlier.<br> <br> You haven't responded to my query and my phone is still blocked. because of this and the above reasons I refuse to pay you. And even if it is somehow something that went wrong on I won't pay you out of bundle rates for this data because of the late notices.<br> <br> I am willing to get my lawyer involved if required as I cannot pay this ridiculous account of yours.<br> <br> Reference number: S3-9J11F-FZ27