Nedbank Complaint

I have a Nedbank credit card I have not paid in a while due to not having a stable salary. On the 20th of September I opened a Nedbank current account for my salary to be paid into that account as I wanted to start making payment towards the credit card. 24th of October, first salary was paid into my Nedbank current account, the 26th of October they deducted R4471 without my consent. I feel ****** as they did not warn me, when I opened the account I was never advised this would happened. If Nedbank do as they please on one’s personal account how do I then trust them with my money? How am I supposed to attend to other responsibilities? I still need to pay school fees, pay my rent, groceries etc. That is very rude and selfish