Bad service from Brand Manager DARREN and Floor Manager

No service from FNB in Brooklyn Mall Pretoria. My credit card was "activated" but decline at three shops with "Authorization required" The floor manager at this branch refused to call the branch manager after I went there tree times. He was arrogant and rude and said I must sort it self with Credit Card Division. I refused and said it is their job to assist customer. He left me. Luckily the branch Manager DARREN past and I ask him to assist. In short, the service from the manager even worst. He just said: Call Credit Card Division. I said I am here to be assisted. His response: The branch is not responsible for credit card and doesn't have anything to with this. In short: I sit with a credit card which I cannot use. Are there a friendly, willing staff member of FNB who are willing to assist me?