Data Usage

I came to the Rustenburg to find out what could be consuming my data so rapidly I was told that they don't have a technical team and should call. They put me through the call centre agent who also couldn't help identify what the cause could be. The nearest technical support is in Pretoria or Johannesburg???? What is the purpose of this office if we have more complex problems than just dealing with accounts. This is the third month that something consumes my data and I have switched off all the updates, I don't use my phones for social media or even connect them. Between 5am and 1pm records show that I was online and used 4GB. Yet for 10 days I used 1.5GB. And all your agents can tell me was that I was on the internet. I am disappointed and frustrated. I was using a Vodacom prepaid 1 GB that could last me a month and with Telkom I've consumed 20GB in 3 months and no one can tell me what to do in order to prevent this from happening. What is the point of a technical support online. For such a loyal and trusted brand it ia disappointing. I understand why people kept saying don't take a contract with them.