Vodacom frustrates me yoh..

I have a huge problem with vodacom customer service as well as how they deal with their customers, it's second month in a row where I'm experiencing the same problem. I have been with vodacom for years now however I'm serious considering changing networks. "I load data of 10gig a month last month when I was left with 2gig it all disappeared and I called them and they said they investigating on it than this month as I was left with 3.20g it happened again it all Dissappeared and I called them they said they with investigate and get back to me its been days now I'm waiting, even last month my issue didn't get resolved. Maybe it's me have ya'll notice it's so difficult to get through to vodacom customer service and speak to the consultant - It is always this voice prompt now which you can state you issue or it will transfer to a robot that still can't halp at all. It really frustrates alot as when you pay for something you expect good customers service as well as if you have issues they get sorted.