***** at Vodacom

I feel very fustrated, unhappy and disgruntled with vodacom. I used to receive very good service for 6 years until now. My account shows that I used an extra R 2000 of data that I KNOW I did not. I have very little aps on my phone ,no automatic updates and I use my uncapped wifi from mweb. Yet, I sit with a vodacom account payable this weekend of more than R3000. My usual account for this device is R 600. I tried to sort it out by going to a consultant at vodacom, I phoned the customer service and spoke to 2 different departments. They can only tell me that this data I aparently used is very strange but it seems that I only need to stop complaining and pay up. I am convinced that ***** has taken place or it is a faulty account. I cannot pay R 3000 for services I did not use!! I get the idea that vodacom does not care at all. I am so mad!