Inconsiderate!!!

This morning my boyfriend had my bank card in his pocket to deposit money for me at the Nedbank in Overport Centre, upon walking out of the centre the card fell out of his pocket. He noticed within 5 minutes of being out the centre and went back to look for it, the security guard advised that a women had picked it up and taken it to Nedbank. He went into Nedbank to ask and they had already cut it up!! In a space of 10 minutes!!!! HOW is that even allowed?? I would understand a week or months but to have a card handed in for 10 minutes!! I REFUSE to pay for a new card, Nedbank needs to be held responsible for their complete inconsideration. Nedbank drives me INSANE, I am so tired of the terrible service and this was the cherry on top! I am a private banker so I cannot even call the call centre without getting passed around to 6 different people and then get told to contact my private banker who is not always there! How can you not even find the owner of the card?? Or at least wait 24 hours for the owner to come forward?? If I cannot get a new card without having to pay for Nedbank's mistake my partner and myself will both be pulling our investments and closing our accounts.