Telkom *****ing my subscription

Data consumption in recent month I subscribed on free me 1gig , but never had problems except this months where all my data and minutes just got depleted in less than a week after being recharged. So I decided to call customer care to find out if maybe there’s something consuming my data, as my phone setting hasn’t been changed and but now I’m experiencing high level of data consumption. So I was assisted by a guy name Letlhogonolo who told me it’s normal for about more than 1 gig can be consumed , and they can’t help me as they can’t see anything on their side. I normally get notifications when my account is being recharged on monthly basics except that on this month I didn’t get notification and I’ve already received September billing although it’s only the 10th day of the months. Which is weired for me to be billed in advance and already exceeded my monthly limit increase