Bad customer service at Nedbank Centurion Mall Branch

I ordered a replacement card (Savvy Bundle Amex) and it was delivered at Nedbank Centurion Mall. I went to the branch to collect the card after I received the sms notification. After waiting in a queue for a long time I was eventually attended to and the teller who was helping me could not link the new card to my existing cheque account so she called the bank's card division for assistance and they could not resolve the issue either, she requested assistance from her supervisor who also tried without success, eventually they came to a conclusion that the card is faulty/damaged so they discarded the card and re-ordered another one. Once again I went to the branch after receiving the sms notification to collect the new card to my surprise the same thing happened they couldn't link the card and I was told the same story over again and I told them that it is not possible that all the replacement cards made for me are faulty and I am not gonna go there again, sit and waste my time only to be told the same story, so they must sort it out, the the lady who was helping me wrote down my cellphone number, promised to investigate and get back to me, ever since then I never heard anything from them and its been 4 months now. Their service is pathetic, Can somebody who knows what s/he is doing resolve this.