I can not sign for something I have not recieved

An employee of Nedbank literally wanted me to acknowledge reciept for a card I had not seen nor recieved after Nedbank had made more than 2 mistakes with my cards previously. 1. Card delivered to the wrong branch 2. Name spelt incorrectly on card. Firstly I would like to understand how clients are expected to sign forms confirming reciept of cards where as they have not recieved them. 2. With a heavy heart as I really liked the product I would like to cancel the account as it is just becoming too much admin for me even before I have started using the account.