Lack of service delivery

Good day, hope you can assist. I received a phone call from your outsourced sales department some time in May 2015 offering a 2 gig wifi router for R139.00 per month. The sales consultant confirmed that I will only be paying for the data. I double checked with her if I will only be charged for the data and not the wifi device and she said yes, i then agreed based on this principle. I later realised that I'm charged for the wifi device which is not what I agreed to. I logged a complaint regarding this matter over a month ago and the matter has still not been resolved. Sasha from this company (Rewards co.) called me back for more information and promised to call me back and she has not to this day. I then followed up with the company 2 weeks ago and spoke to Shaista who waas very patronizing. She refused to let me speak to a supervisor as she claimed there was none available. She promised she had sent Sasha a request to call me back & has not done so in 2 weeks. I refuse to believe that Vodacom trusts such an *********/shady company to handle our accounts. I would like this matter to be resolved asap because it's been going on for too long and wasting my time & airtime. ***