Disappearing Airtime and Data issues

I think Vodacom is the most expensive service provider. The most annoying thing to me is how randomly your airtime will disappear and when you call to find out what's going on, you are told you are subscribed to some mysterious service which Vodacom is not afflicted to. When you ask how, there are no answers , when still no clear answers. My thinking is each customer should receive a notification when subscribed to something. There is nothing worse than expecting your monthly airtime only to find it disappearing. I think that Vodacom is robbing their consumers and blaming it on some \service\" we cannot account for. Never mind the fact that they have the most expensive offerings. the call center agent said he would give my the number to complain both to Vodacom and this \"service\" which I was subscribed to, guess what I'm still waiting. "