Vodacom do not care about clients

My husband upgraded his contract online with Vodacom. After a week they only delivered the phone. When we took the phone out of the box it was not working. We phoned immediately and ask if we can take it to a Vodashop. They said no they will collect it from us. After another week they collected it from our office. After not hearing anything from them we phoned to hear when will the new phone be delivered. They then told us it was never collected we must still have the phone. The person who collected the phone had me sign that he collected it but did not give me any proof that he collected it. I did take a photo of the serial number of the phone but trusted the courier picking up the phone. We have only ever gotten good service from a vodashop but their online customer service is terrible.