Disgusting Direct Marketing practices

Late in Nov 2014 I got a call from a Vodacom Direct sales agent to sell me a replacement data contract. They looked at my account behaviour and saw that I use more than my 1 GB data per month and as a REPLACEMENT would offer me a 2GB contract at a reduced fee. A few days later I received a WIFI router and a new simcard. What they actually sold me was an ADDITIONAL 2GB data contract which I cannot access from my phone, unless through the router. I tried to set this up, but couldn't and eventually took this to the vodacom shop in Rosebank mall. The first 2 visits was unsuccessful, as their systems were down. On the third visit they told me that the router was broken and I need to have it repaired. So what I got was a broken WIFI router (That I have to get fixed), and an additional 2GB data contract that I cannot access from my phone. I gave the call centre a call and after much deliberation, the lady told me should would get back to me within 1 day with a resolution. That 1 day was a month ago and still no word. I have paid for this contract for the last 2 months, but to date have not used 1 cent of data. Surely this is breach of contract????? DISGUSTING SALES & SERVICE!!!