unhappy with the service recived.

I am not happy with the R30.00 which is debited from my account monthly which i have not sign up for. when i ask they say is for the rewards bucks. how can i pay to get money rewards in my account. i have been using nedbank for as long as i can remember, but i don't remember even a single day where i was given money or rewards. i am very close to leave nedbank. currently i am not happy with my bank service at all. And i don't even have energy to fight or contest anything.