Credit card cannot be delivered before expiry date

My FNB credit card expires at the end of the month. I had not heard from them 2 weeks before the expiry date so I telephoned the credit card division to arrange delivery to my local branch before the current card expires. The lady I spoke to was very helpful and assured me that the card would be delivered within 5 days. Over a week later, FNB credit card division contacted me asking where I would like the card delivered. They also informed me that the new card would definitely not be delivered before the old card expires but I probably wouldn't be without a credit card for more than a week. This is not acceptable. FNB bank cards are delivered to the local branch weeks before the expiry date, why is the service level in the credit card division so much worse?