My contract is invalid and they breached it too

I was on a 24 month contract from 28 March 2013 to 2015, around February '15 the operator phoned me to ask if I want to upgrade or change my contract. <br> <br> We spoke and finally I opted and gave my consent to \renew"or change my contract to a 6 month Straight up 100 contract. <br> <br> I was extremely busy this year and the whole time I was waiting for the operator to phone me again near the end of my 6 month contract because I wanted to go prepaid. According to my subscriber agreement Cell C will phone me with my options between 20 and 40 days before the end of my contract. Later I thought my contract must really have ended already so I logged into my Cell C. I saw my upgrade date is 28 December 2016. I knew something was wrong!<br> <br> I phoned 140 on Wednesday at 15:02 and the operator confirmed that I am on a 24 month contract. Obviously I am SHOCKED so he escalated the matter (***) and I was informed they will get back to me within 2 working days. This did not happen.<br> <br> I am SHOCKED that Cell C signed me up for a 24 month contract when I EXPLICITLY gave my consent for a 6 (SIX) month contract from 28 March to 28 Sep 2015. <br> <br> I want to be converted to prepaid before 30 Nov '15. Fix it!"""