100mb of data very 3 minutes

Since Saturday my phone has been going through 100mb of data every 3 minutes, called vodacom and they gave me a number for advanced data services who could help. I called them on Sunday and they took me through a whole series of instructions and said if it still happens call back and log a fault. I did that and they said it would take 48hrs for a response from the technical support. 4 days later I call and I get the same story about having to wait another 48hrs. I cannot load airtime of data on my phone as it gets depleted within minutes. For me to test if it works properly I have to load data or airtime. I have done that on numerous occasions and got *****ed. When does vodacom take responsibility and do it with their data. and by the way I found out today that the advanced data services who I spoke to on sunday does not exist any more for a good 3 weeks now so who was I speaking to on Sunday. The people are spoke to now have absolutely no clue of what is happening and they are supposed to be solving customer issues.