Vodacom Secunda Mall cannot assist their costumers

I am using a Iphone 5. I have 559 MB per month. I never run out of data. For the previous 4 months I have run out of data in the first week of the month. <br> <br> When I query it at the Vodacom shop in Secunda Mall, they tell me that they cannot give me a detailed data usage account. They tell me that I must get myself another cell phone. They don't have people that is competent to do their work. <br> <br> It is the 19th of this month I have no data left, I already buy one and a half week ago 1 Gb data bundle. I week ago they took 800 MB at one time, and today another 226 MB. I am very upset!!!<br> <br> No one can tell me what happen to my data. All the data usage settings is been switch off.<br> <br>