My money disappearing every day and Cell C doing nothing about it

For the last many months I have noticed that my money balance on my pre-paid phone (Vodacom Kicka 2) just disappears after a couple of hours, even when I do not use my phone at all. NOTHING is switched on - not my WiFi, Bluetooth, etc. Automatic updates are disabled. No solution is forthcoming from Cell C. Apparently this does not happen to contract Cell C customers; only to pre-paid Cell C customers. I am fed-up. I saw a statistic provided by HelloPeter that the highest number of complaints are against Cell C. Is Cell C even bothered by this ? The only reason I did not give Cell C only a one-star rating, is because their rates are low and whatsapp virtually free. Think before choosing Cell C as your service provider.