Vodacom fruadsters

In April 2017 Vodacom allowed a *****ulant online upgrade on my account. This was brought to their attention. They terminated my number but continued to bill me for the *****ulant number. I have sent emails affidavits and I am not getting anything from them. They procceded to take me to their lawyers demanding payment. At the moment a debt of almost R30 000 reflects in my name. I cannot buy a car without confirmation from them that it is a ***** case. I am so frustrated. I am livid. Vodacom is useless.