Poor service and lack of knowledge from staff

On the 26.09.2019 I got *****ed by one of the Nedbank ATM's when I wanted to draw money. There was a man before me, when I wanted to draw, I put in my card, insert my pin, and then all of the sudden the bank retained my card, without me drawing anything, screen poped up with a message, online transaction. I immediately pressed cancelled, but the card never came out. I then phone Nedbank, trying to tell them that I just been *****ed, they transfer me from department to department and eventually got disconnected. While on the phone, the transaction sms comes through that I have made a huge withdrawl on my account at an FNB ATM. With the Nedbank App not working, I cannot block my card, and the Nedbank operators isn't useful either. Long story short, I just got word that Nedbank isn't going to refund me because they claim that I didn't block the card quick enough. I mean really, if your operators knew what they were doing and blocked it when I asked them too, this wouldn't have happened. I lost a lot of money, now i'm so behind with payments thanks to them it is not even funny.