Absa unprofessional bank

Good day all. Absa called me on the 21st of april asking if they could debit my acount. I explicitly said NO but yet my acount was debited. To put it quite frank absa every month is harrasing me with endless calls every month. They some months forget to put a bebit order on my acount for my credit card.i then have to pay penalty fees for their mistake I have numerous occasions gave them permission to put a debit order on my acount but some months they dont debit my acount. I am on the verge of reporting this to the NCR. As this is totally unprofessional