Unaccounted data and airtime

<p>Cell C has some serious explaining to do. On Monday I bought a 500mb data bundle. I barely use the internet and i notice that my data and airtime is almost depleted the next day. There is no way possible that I used so much of data!!! Cell C has messed up several times in the past and this is yet again another instance! Kindly investigate and remediate this matter as data is expensive and I don't have the time nor patience.</p>