Pathetic aftersales service

A few weeks ago Vodacom Partner Services contacted me offering me an upgraded data contract on my existing data contract. It was upgraded from 5gb to 20gb. But a new sim-card was issued. I was promised that the old sim-card and 5gb data package would be cancelled. But this was not done and I am now paying for two contracts instead of one. I have contacted Vodacom but now I am going from one department to the next. And getting cut off from the call in the process. Data contract no 082 706 109 to be cancelled. This review was done 3 December 2019. Still waiting for Vodacom to contact me.