airtime vanished overnight

When I went to sleep on Tuesday the 29th of September 2015 I had over R100.00 airtime and data. When I woke up on Wednesday the 30th of September 2015. I had R1.00 airtime and no data. <br> <br> I called the 808 call centre they said they can't tell me what happened I need to call 1555. I called them and they said I must speak to the 808 call centre. When I called again I was on hold for so long.<br> <br> I didn't do any updates and I didn't download anything. I want to know what happened to my airtime and data. I need it refunded back please. The same thing happened last month and I didn't query it. I loaded more airtime. I cannot keep spending money for nothing. <br> <br> If mtn doesn't want to explain and refund me. They must please send me a cancellation form so I can go use another network that won't rob me of my hard earned cash.<br> <br> <br>