Airtime *****

I wrote a previous complaint, which Vodacom just ignored, because they make millions of rands each month by *****ing Pay as You Go clients' airtime. I went to a Vodacom store and an employee confirmed that it is the case. My airtime just dissapear without me making any calls or sending any SMS's. I am also going to the Ombudsman about this, as i have evidence that I have NOT used any airtime. I have a mini statement showing that I am supposed to have R70.00 left on my airtime, yet on my phone it shows I only have R3.25 left. On the statement are SMS's and tel.numbers which I dont' even know!