Disappearing Data

I have always been very happy with Telkom and really appreciate the lower tariffs on data but my data is running out at a very high rate the past 8 days. This is not due to me being on my phone more or my phone using unnecessary data. I have been monitoring my data use on my device and I noticed the problem as follow: I would do data check on my device to make sure there are no apps running high data usage and via *101# and the app. There would be more or less a 1GB difference and my data notices are frequent via sms and it runs out before the data indicator on the app.

Please correct as this is unacceptable and definately data theft!