Contract card not working!

I renewed my contract last month on number ***. Before I did the renewal I was able to use the internet on the sim card but unable to make calls. Since I got the new sim after the renewal it does not work. It picks up signal but I cant call out or use the internet. I have called the call centre 4 times. They told me they have synced the card and I should try after one hour again. It still did not work! Nobody at Vodacom knows how to resolve the issue. I have purchased a 3GB bundle which I cant use and will expire and Vodacom will not give me back that airtime. Please sort it out ASAP.