Missing airtime

I recharged my account with R150 before leaving Bloemfontein on the way to Durban at 12:54<br> At just before 15:00 I stopped for a bite to eat and tried to reply to an SMS that I received and found out that I've got a zero airtime balance so I called cell c customer care to report the missing airtime. The operator told me that I used the airtime as data. I explained to her and her supervisor that this is not the case as I was driving and I know that all apps on my cell was closed and that all auto updates on the phone is switched off.<br> They maintained that I used it and that there's nothing I can do about it.<br> <br> At 16:30 loaded R50 airtime and switched cellular data off completely.<br> At around 19:15 I checked and the airtime was still there so I switched the mobile data on to do a quick check. Within less than a minute both the 'free' data of 50mb and the R50 airtime was depleted so l called cell c again and told them what happened. <br> Again they said that I used the airtime. I explained to them that even though I was on the internet it is physically inpossible to use that much as the internet speed is a lot slower than that even if I downloaded something that big.<br> They again said that I use