Upgrade nightmare!!

I wanted to cancel my cell c subscription. Was chatted into staying and upgrading. The wrong colour phone was delivered. Since then I have received numerous contrasting information. Once agent told me to go to the head office to exchange there. Drove 100km both ways just to be told they cannot do it. One agent told me he can assist me to get a new phone within 3 days. Since then have been unable to talk to him again. Another agent told me they will arrange urgent collection and that I should just phone the next day after collection to arrange delivery. Firstly collection took two days with me having to phone yet again. Now Im being told its going to take 3 days to assess and then another few days for delivery. This is a joke! I am stuck without a phone as my old phone has now stopped working. I cant even cancel at this stage as the phone needs to be assessed first for three days. My work is being affected as I am not available to clients. I need somebody to urgently sort this out!