Cell c month to month data issue

I wanted to cancel my so called month to month contact today, only to be told cell c changed it to a 24 month contract without notifying me. This is nonsense because it's called month to month for a reason. Also I'm now asked to pay over a R1000 if I wanted to cancel immediately . I've been a cell c customer for all my life but now I'm extremely disappointed with the lack of communication and transparency. You're now forcing customers to stay with you by asking to pay for a 24 month contract to cancel a month to month contract!?