AIRTIME AND DATA THEFT AND BAD SERVICE

For a while now I have noticed that when I load airtime or data it all just disappears even when all my applications are closed. I found it very frustrating when I buy 1G data and load onto my phone just to have it depleted within days. Again I put another 1G data on my phone and over a few days its gone !!! I also load airtime which I cannot use, it keeps telling me I have insufficient funds after I load a R29 voucher. So today I decide to call the MTN call center number and find out where all my money is going. I explain my airtime and data issues to the consultant. He explained that he cannot help me and would transfer me to their technical department, that didn't happen because he dropped the call. I phoned back again and had to go through all of the voice recordings etc which takes about 5 min and still have to wait for a consultant to attend to me. I get through finally to another consultant but before I could explain my story the call was cut off again!!! I have been with MTN for approximately 10 years now and am totally disgusted with them lack of good service. I want someone to explain where my airtime and data is going, it my money and I have the right to know !!!