Vodacom **** with 20gig data deal

I just want to warn clients of vodacom that they must not fall for agents phoning them and offering a 20gig data with a huawai modem for only R200 per month. Even if they promise to put it on a email that it will not be more than R200. Don’t do it. My first account was R8500 which they just deducted one sided from my account. On enquiry I was promised it will be reversed. It never happened. They are dishonest with how they try to trick consumers. They never put a cap on the data and the modem is set to connect to a device even if you set it to forgot the network. They then ask some rediculous amount per meg for going over 20 gigs. Then they also dont inform you how to check your balance. I know of many people being caught this way