Incompetence and breach of contract.

After quite a few years of 24 month cell phone contracts,I signed yet another one about a year ago.To my regret.Where my airtime on the type of contract previously(Top Up)was carried over to the next month,now after a week or two I have to top up again.I only use the phone for emergency calls,so I really make very few calls.I am now at the stage that whatever airtime I upload today,will be gone tomorrow,even if I did not make a single call.I went to their headoffice and apart from my auto internet update being disabled by them,the person helping me could not answer any questions.I don't have a name but I did take a picture.I was hoping this would work,but it didn't.I see this as bridge of contract and incompetence from Vodacom.I would prefer to end the contract early but refuse to pay Vodacom any penalties as a result.Quite prepared to get legal aid.