Data Charges

For the last 5 months I've had increased data bills. I have logged calls with to Vodacom with no resolution. Last month Vodacom reduced a R9200 data bill to R599 in bundle charges. I also loaded an additional 17Gig over and above my normal monthly 5Gig. This morning the 8th January 2016 I spoke to a Vodacom consultant to complain that my 5Gig is finish and he also advise that I'm again overspend on data of R6000. he helped me change settings on my phone, but my settings have always been the same and haven't changed my way of operating my phone using email and facebook. Vodacom has still not helped me resolve this issue as it seems to be a recurring issue and I'm starting to question the billing the data instead of my usage. Again I refuse to pay R6000 this month even if they reduce to in bundle rate there is no way that I have use my 5Gig data in 8 days and overspend with R6000.