Vodacom service

I'm really unhappy with the service of vodacom. I'm now trying for more than a week to upgrade my phone and don't get the service that you would expect from them. I am the one that needs to phone them to find out what is going on with my order and every time they have a lot of excuses this is now going on for a week. This is unacceptable and I will not recommend them to anybod. Now the agent tell's me I must go to a shop and see if they have the phone that i am looking for I don't have the time to do this. I fly out to Zambia in 5days now I have to run aroun and find a handset on my expenses. Why do you have a contract if they can't or won't help me