Contract Amendment

I've been receiving calls from Telkom regarding my two lines of contract that are ending on the month of March. I decided to call the customer to find out about upgrading, the retentions agent that I spoke changed my contracts without my consent and further explaining what she's currently signing me up on, mind you I found out about this TODAY when I went to the store, I'm on a different agreement now which was not explained to me, I ca not change it because I need to wait for a certain period of time, my other lines are canceled. This is not what I signed up for.