Dispute rejected

After a dispute with Vodacom with regards to a repaired phone that is gone, they expect me to eccept it. Don't ever take your phone for repairs to canal Walk. I am not happy with the outcome, as they cannot evens say where the phone is. I decided to cancel my profile and contracts with Vodacom, I must now hear that I cannot do it. As far as I know I'm on month to month and can cancel anytime. I am gatvol of these type of pathetic services. I can rather join another network. If they say I'm a valued customer than you treat me like that.