Data billing of R4500

I received a bill of R4500.00 from Vodacom in February 2015 <br> I have NEVER gone over my data limit ad if I had it was by a few hundred.<br> <br> I went into the Blue Route shop and sat in a line for 30min. Once I was helped I requested a itemized billing sheet from the gentleman and saw that my data was being used at ridiculous times of the night and morning. Times when either my phone was off or I was connected to Wi-Fi and the Mobile Data was OFF, I then was told I must got to the Chanel Walk branch and tell them what has happened. We proceeded to go to Chanel Walk where they typed a few lines and sent an email, told us that is all they can do and head office will be in touch within the week. 1 week went past and we had heard nothing so we then decided to go into the Chanel Walk branch and see what had actually been done, and once again they typed a few lines and emailed head office. The following week I received a very RUDE phone call from a man called Mervin Timm who was rude and spoke to me like I was a little child.<br> <br> I will never be getting a contract with Vodacom again. Problem has still not been resolved. Had to pay it as they blocked my service until I paid it.