UPGRADED AND CONTRACT CHANGED WITHOUT MY CONCERN

I had a 12 month 20GB data with Auto page and Cell C starting from February 2015.<br> Mid February 2016 i received a call from auto page asking me if i am happy with their service and to find out if they can help me with anything. <br> Next thing in march i find out that i have a 24 month contract that will expire in 2018.<br> <br> Auto page never even bothered to send me upgrade communication or new contract to sign.<br> <br> I never planned on extending a contract, i was happy keeping it on a monthly basis because my wifi is too old to go for another two years. i am very angry and disappointed.<br> <br> I want to take this forward. PLEASE ADVICE WHERE TO TAKE MY CASE.