TERRIBLE SERVICE CONTINUES

So, during Oct 2018 I laid a complained about Vodacom and them Billing me for a service I don't have or want. November I was told that this has been resolved and they will credit me for the so called "Arrears" account. JOKE of the year. Nov 2018 I was billed once again for this service and only from Dec/Jan this is not reflecting on my account But the amount I have been charged for during Nov/Dec is still showing as in "Arrears" Since Dec I am phoning them to Credit me and clear my account But to No Avail. I am just waisting my time and energy, as every two to three weeks I have to phone again, explain my story again and again and again and again.... I want Vodacom to rectify this Please, once and for all... Going to cancell my contract and get my attorneys involved, this is Terrible Service 1year en 3months later.....???