Poor service

I app**** for a phone online with vodacom (16/01/2019) and a day later an agent called me back,took my details and said I qualify for a certain phone. She said it was approved and that it would be delivered at my workplace within 3-7 working days. A week later, still no phone and no massage from vodacom. I called vodacom to ask what was happening and another agent told me the order is still in progress. Till today (03/02/2019), I haven't received a message from vodacom. Everytime I call them they shift the blame to another person/department. So now how do I cancel the order because clearly this is going nowhere and my profile at vodacom is still active?