Sim swaped without my permission

I have been using vodacom for 14 years and 3 months and never had issues, but I until recently when my Sim was Sim swaped without my corncen. I visited a vodacom shop and the Lady told me that it is possible because it's a self service where by one speaks to Tobi the robot, next thing my banking app was blocked and the bank told me that someone has been trying to access my app. Vodacom is lame they cannot let a robot run such things that needs security questions. It pains to understand that our personal information is not safe with Vodacom