Billing me for a device I do not have!!!!!

Vodacom is utterly ***********. I have cancelled my upgrade and subsequently my contract with Vodacom, but then you send an invoice charging me for a handset I have not got! When I phone the call Center I am put through to different departments not 1 consultant being able to help me! I logged a complaint and I get an sms telling me that my issue has been resolved but the account still has the handset charge on it! Come on Vodacom!!!!!!!!!!!