Unauthorized debit order

I'm really frustrated and disappointed. I noticed I've been paying NRB fee I never subscribed to since December 2017 (it could be even prior to that). Why am I paying for something i did not sign up for?? I called the call center they did not help as they advised its an Internet banking fee. I have a Savvy account, I Pay R106 maintenance fee and that comes with free digital services?? why am I paying? I want my money back please.