Telkom Mobile data disappearing

I am having a problem with my data. I received an sms from Telkom 2 nights ago that I had 498 mb of date. The next morning I received another sms from Telkom that my data was at 100 mb.. <br> <br> I called Telkom early yesterday morning and logged a case and I have received a reference number. I was told by Telkom that my internet has been running from 2:30am, which is strange because I close all my applications before going to sleep. I was advised to turn off my cellular data, which I have done since, then I check my data and its 42 mb!! How is that possible if my data is turned off??<br> <br> This is shocking and has never happened to me before and downright unfair. I would like my data of 498 mb reinstated as a matter of urgency. <br> <br> I was also told that the turn around time of response at Telkom is 72 hours, when I called today and my case had still not been allocated. <br> <br> Telkom please respond and contact me in this regard, this issue is causing me a lot of inconvenience.<br> <br> Thank you