Void all paid for minutes/sms when migrating

My contract was migrated to prepaid on the 8 Nov. On checking my balance I find all minutes/sms etc were nullified. Firstly, I was not informed this would happen. Secondly the minutes were something I had paid for. <br> The agent I just spoke to informed me that I dont have a contract anymore so I should start from Zero. <br> Am I still not a customer? Am I not entitled to services I purchased? OR is it that once youre out of a contract youre no longer bound to Cell C therefore are expendable?