Uninterested in ********** charges

I have an outstanding query with Vodacom customer service. They promised to resolve it, but they just don't care. I explained very patiently that Vodacom has charged me for content services that I did not authorize, and that I would pay for my subscription excluding the unauthorized amounts. It was agreed to, yet they still add these amounts onto my invoice and because I have not paid for their error they suspended my cellular service - Again. No Notice, no SMS notification, no email, phone call, no communication, just suspended. That's what you get for being a reliable customer for 20 years.