Not honoring contracts

<p>I went to the Vodacom outlet in Menlyn on Friday 13 January 2017. While I was there the sales representative informed me that they are running a "Friday the 13th" special and that ANY new contracts or upgrades that is signed on this day will get 20 GB of data for free for 24 months. I immediately took out two contracts (I already have 4 other contracts with Vodacom). This morning the sales representative called me and told me they have made a mistake and they can't honor these contracts, but is willing to cancel them for me. I strongly opposed this and I am now getting all kinds of resistance. I can't believe that a big company like this can be so dishonest.</p>