LOSS OF DATA WITH NO APPS OR INTERNET PAGES OPEN

I am in shock and horrified with MTN data billing. I Just connected my data to my laptop and without opening my email or internet browser or anything on my laptop the estimated usage went up to 522.32 MB!!! I sat and watched in horror as my data was being depleted. I have no automatic updates on my laptop at all. I have been a MTN customer ever since I have had a cell phone and that is many many years. I loved the service MTN used to give. I have been using my same laptop for the past 3yrs and have never had a problem with data which has always lasted, but in the last few months I have had to buy data twice a month. I do not go on facebook with my laptop as I use my phone and linkedin on my phone.HOW CAN THEY(MTN) COME UP WITH THE STORY ITS OUR SETTINGS THAT IS DEPLETING THE DATA. MTN HAS JUST LOST A LOYAL MTN CUSTOMER!!! IS THIS WHAT SOUTH AFRICA HAS COME TO WHERE COMPANIES CAN EXPIRE PREPAID DATA WHICH I HAVE PAID FOR.ITS MINE. AND I AM OUT OF POCKET. MTN YOU ARE SO WRONG. PEOPLE SHOULD BOYCOTT YOUR COMPANY REALLY. .S0 MANY PPL CANT BE WRONG.RELOOK AT THE CHANGES AND CHANGE IT BACK TO THE WAY IT WAS PLEASE.