Disappearing Data & Airtime

I am extremely upset with Vodacom and their stupid explanations. I brought 100MB of data at 12.25 and R29 airtime at 13;00 , I tried to make a call an to my surprise the airtime I had bought was depleted> I called the call centre to find out what the issue was and was informed my airtime was consumed by the internet> I told the lady on the line that I always keep my Apps off and the only App that remains on is Whatsapp. She then agreed to call me back after investigating. In the mean time I loaded another 100MB and responded to a WhatsApp message. When I checked again my data had been depleted again. This lady from Vodacom called me and informed me that she had completed her investigation and my data and airtime were depleted by google, google maps and facebook, how is this possible when I have my Apps turned off. I am not satisfied with this useless explanation. I'm fed up with Vodacom and I am now afraid of buying my data and airtime because it will disappear and will be given a dumb reason