Bad customer service

The service is terrible, I have had a problem since last year, paying for a upgrade I did not do. Paying for a device I do not have. They say every few days I phone they can see that to be true, and will fix. But they move me from department to department. Nothing gets resolved, You get the feeling they say what you need to hear, end the call but then do nothing to fix? They can't give me the device as it is canceled and with elite mobile. Absolutely terrible Vodacom. Not expecting this bad service and months of struggling.