Waiting for limit increase

I have an American Express Platinum credit card and I called Nedbank on Monday 14 March to apply for an increase on my credit facility. I was immediately informed via sms that the application is provisionally approved and was sent for verification. A week later I still haven't received notification of the outcome. I called card division today. I called card division today and was told I couldn't be reached (old number on the system) for further information , however my current number as well as email address are on file; so Nedbank hadn't gone to too much trouble in contacting me. The required information was submitted, yet still no decision. Does it take in excess of a week to vett a limit increase application - really?? I've had quicker responses on home loan applications. The card will be chucked and the account closed. What about Platinum customer service?