ABSA - UNAUTHORIZED PAYMENT - JOURNAL RCCS J

I swiped my card and when I received my SMS, I noticed that I had A LOT less money in my account. I logged into my banking app and saw that an unauthorised debit order had gone off. The reference was JOURNAL RCCS BOS J. I called the ***** department and a gentleman answered. As soon as I mentioned the reference number, the call dropped. I called again and the lady who assisted me said that it was ABSA's collections department and that she could not assist me in this matter. I then asked her what would the collections be for. She then said "Mam, like I said, I can't assist you. You will have to contact them tomorrow." I need to use my card, which I now cannot because I have to wait until tomorrow. Is this even legal to just take money out of my account without my authorisation?? Why didn't I receive a notification as soon as the payment went off? This is the fourth issue I've had with ABSA this year and I am just sick of it. If you are choosing a bank, please don't consider this bank, unless you enjoy losing money, pathetic service and sleepless nights. I am switching banks tomorrow.