What is happening to my Airtime/Data

<p>Once again, I find myself experiencing the same problem again with Cell C. Despite having available data remaining, my airtime gets utilized. The last time a data validation report revealed that there was some abnormalities and I was reimbursed. This is totally unacceptable. We trust that we will not be de*****ed but this is becoming a common problem. Over the past few weeks, I noticed that my data got depleted really fast even though I barely used it. The last and noted incident is 16/07/16 around 10:59. I loaded R100 earlier, received free data but also my airtime was used with some data remaining. I had to end up buying another data bundle with the balance of my airtime.</p>