*******ly upgraded my line and owes me money

I have completely been left speechless. How can one company continue to mess up over and over. I was at the canal walk store 7 days ago to lodge a complaint because to my surprise vodacom online has *******ly upgraded my sim only line which i want to cancel and locked me into a contract for 24 months. Get this damn mess sorted immidiately. Not only has no1 contacted me. You send me an email to rate your service. Service to what. For calling me amd placing me o mute and then hanging up. On top of this. I hada credit on my account to the amount on 700 plus rand. You have not refunded nor have you deducted the amount from my bill because i have beed paying the full amount which i can clearly see on my banj account. Should i not hear back from you within 24 hours. This matter will be logged in accordance to CPA.