Vodacom sells misleading data contracts

I was phoned by a Vodacom sales agent in October 2014. She saw that I use all my phone's data bundles monthly and that I then purchase additional data bundles. She told me about a promotion where I can purchase additional bundles FOR MY PHONE but it is a separate contract. And as an added bonus, they will send me wifi router. I told her that I do not need the wifi router, as we already have a wifi router at home. But she said it comes standard with the contract. Earlier this year, I received an sms notifying me that my data bundles on my phone had been depleted. And when I logged into Vodacom's website I could see the additional data contract that I took out, but the data was not available to use on my phone. I phoned Vodacom on the 15 Jan 2015 to find out how I am able to use the data on my phone, but they confirmed, it is only available to use on the wifi modem. I logged a complaint saying that the contract was sold to me as DATA FOR MY PHONE and I was mislead. The agent confirmed that my call would be traced. No one came back to me. I phoned again on Friday the 30th of Jan and the agent said they would call me by Wednesday, the 3rd of Feb. And still no one has called.