Vodacom refuse to look at ***** case

I have a ***** case that's been unresolved since 20 April 2018. I have been to 3 different in store locations, I have had multiple phone calls with customer care, to which they all say I need to speak to the ***** department. When I try contact the number/s provided, there is no answer. Vodacom refuses to contact me to resolve my case to which I am no longer able to renew my contract, but the person doing the ********** activity is able to. Now Vodacom are trying to force me to pay my account that is apparently in arrears. My contract ended end of April 2018!!! Is there no way a consumer can be helped by not having Vodacom ***** their money?