Airtime moving like an open tap.

It’s that time of the year again where Vodacom takes all my data and airtime and says there’s a problem with my phone whereas this only ever happens once every few months so it clearly cannot be my phone. I have changed phones twice now because they say it’s my phone and every time I change my phone, I experience the exact same thing. I went to bed with R136 airtime and a bit of data. I turned off my cellular data and went to sleep at 10:30. I only woke up at 7am. Between midnight and 6am this morning apparently my data was active and my internet was in use which is why I woke up with no airtime and no data, even though I made sure to close all apps and turn off my cellular data so I honestly do not understand how it is even possible for there to be any kind of internet usage when I have physically turned off my cellular data. I do not subscribe to online games and music and videos because I know they can be ****s and are the biggest users of data so that’s not it either. Iv turned off my automatic updates so it’s not that either. The call centers always tell you to change every single setting on your phone and when you explain to them that it is not your phone because you go through this every time your data or airtime goes missing, they say they don’t know; will get back to you and never go. Vodacom, it makes no sense for airtime to disappear like an open tap. Iv watched my data usage and seen how much data my phone would take per minute, I monitor my data usage all the time, so it is not my phone that takes R200 in the space of 15 seconds (which happened to me just last year and I was never refunded for it) guys please help me out. I loaded R200 airtime just yesterday and bought some data and I’m incredibly frustrated that the very next morning I have nothing. Please do something about this, please refund me just the remaining R136 that you took and I can go about my life. Just the other day I was recommending someone leave their network to join you because your data is cheaper than theirs and your network range is better but constant things like these are enough to make anyone leave.