Data and airtime depleted without use.

I receive my monthly airtime on the 27th and only after 3 days my R200 airtime and remaining data of around 300MB was gone. I keep my mobile data off for God's sake. My son is in IT and makes sure all applications are up to date so don't ******** me. I became more of a fool and bought airtime and before I could call anyone, it had been used up as well...***!!! I just want my airtime and data back or else you can cancel this contract. I have been your customer for over 10 years and you treat me like a piece of **** which I don't appreciate. Had escalated a call with *** but no response and only told it can take up to 7 days #sigh. Wish your company burns down like Jumbo Cash & Carry.