VODACOM CALL CENTRE / SERVICE JUST LEAVES ME SPEECHLESS!

I did an upgrade with Vodacom and they sent me a phone that does not work. I was told that they would collect the phone and only then cancel the upgrade. Since them I have spent approximately 3 - 4 hours a day being passed from call centre agent to call centre agent to find out when the phone will be collected. In each instance after spending about 30 minute on the phone with a consultant I was transferred to another queue to spend another 30 minutes with a consultant, none of which could help. They couldnt find the account, or couldnt find the upgrade, or couldnt find the call advising the phone instrument was to be collected. Now 5 days later I still cannot get any assistance. I am beyond desparate. Requests to speak to team leaders or managers are ignored as if you didnt ask the question. I am beyond desparate and dont know what to do any more. There are no other numbers published.