Every month my airtime disappears

<p>Evetytime my airtime disappears they blame it on my auto updates and they take me through the process of turning them off and I let it go, this time am NOT yday I check my balance and I had R163 on my monthly airtime and R12 on airtime balance that's a total of R 175, which I Dan decided to buy 1GB 7days data, this morning I check my balance and m left with R20 airtime? So wat happen to my airtime? I call and they again blame it to my auto-updates which were switched off last month now this is impossible please refund my airtime cause there is no auto updates on my phone, and y did they take my airtime and not my data?????</p>