Vodacom customer care is really bad

Vodacom is not helpful at all ,as a big network in SA I've expected a lot from them. I've took a top up contract with them but their agents are ****mers they decided to put my line on open line without me knowing, I've logged a complain before but it seems they don't care because clearly they benefit from all of this. 1st time I noticed that they didn't debit their monthly bill, I gave them a call to find out what is happening then they explained that my line is on open line without my knowledge then they said they can't do anything to help I have to pay the amount which I did because I was scared that I be blacklisted for something I didn't sign up for which I paid 2 times for the line I didn't opt for then I said no maan I can't keep paying for what I didn't sign up for. Please vodacom I wanna dispute all of this as I wasn't allowed to cancel my contract because of your 'grace period' as I wanted to prevent your crazy bills please dispute .and they stated that there's nothing they can do like how😫