I just got the following email :-

"Unfortunately an error occurred and your transaction could not be completed.

Your credit card has been charged but the necessary documents could not be issued.

Please call your nearest Emirates Contact Centre as soon as possible.

Unfortunately your booking has not been successful due to a problem authorising your payment. There may be a problem with our payment system at this time. Please try again using another payment method. If you repeatedly receive this message, please contact us for assistance, or other select another payment option, if available.

Best regards,
Emirates"

So, my credit card has been charged, even though it was not authorised?