PINNACLE 3 G - MISLED BY SALESPERSON

Took out the Pinnacle 3g contract via a person calling in to upgrade me. I today received my benefits and see instead of 300 free minutes as I was told - I get 90 minutes to any network. I am so frustrated - I only have 1 person I call on Cell C - the rest are on different networks. If I upgrade they want to charge more money and I also cannot just top up on my own. VERY ANGRY AND UPSET - stuck with this for 2 years!