Fed Up

Fedup with Vodacom I have a Vodacom data contract of R319 a month. It is a Top Up contract. Yesterday I went onto their website and it showed my account balance was R1744.72. As you can imagine it was a total shock to me. I phoned them and they told me I had an open line. I argued that and last night I checked my contract. It clearly states that it is a Top Up contract and not an open line. I again queried this this morning and was told that it had been changed last month. I never asked for it to be changed. Also, this is not the only issue I have with them. There is ***** for the third time now on my account. This month, among other things, there was an airtime transfer. How is this even possible? My contract is a data contract and not air time. If it wasn't for the fact that the Vodacom signal is the only I receive where I live I would have changed to another network a long time ago. I am totally fed up with Vodacom.