Data ******* and Telkom isn't helping.

I logged connected to a Telkom wifi hotspot while updating apps but my cellular data was used. I had switched off cellular data before connecting to the hotspot. when I called Telkom I got a case opened on the 25th of September. Between the 25th of September and 3rd of October my data usage just high and I couldn't understand what was going on. <br> <br> I switched off my phone at 12.48am on Saturday the 3rd of October and when I switched it back on around 8am I saw that 500mb had been used overnight while the phone was off. From Friday morning to Saturday morning my phone used over 2gbs of data according to Telkom's data records (even after being connected to wifi at work for most of Friday & my apps don't update off cellular data). <br> <br> I called Telkom and they added these notes to my case. Additionally I was put on hold for almost an hour only to get disconnected before my issue was addressed. After calling the call center, I used my phone as usual and my data usage has been normal since.<br> <br> I called the call center today (Friday 9 October) & my case is still not resolved. I just want Telkom to credit me for my data and make sure this doesn't happen in future. I am terribly disappointed!!!