Problem with order cancellation -- advice needed

Hi,

I recently ordered a macbook air from the online apple store, however i quickly realized that i had ordered the wrong one (i selected too small a hard drive) so i canceled the order...i planned to order the correct one immediately after, however when i went to do it i had insufficient funds in my account...Clearly they have charged and not yet refunded the money for the first one (which i cancelled).

Is there ANY way i can order a new mac on the site without having to wait 4-5 business days for a refund that i assume is coming? since they have my money anyway, surely it's just a matter of reassigning it to the new order? The reason i can't really wait is that i'm cutting it fine already -- im leaving the country in a few days and i really need the mac to arrive before then!

I would use other money if i had it, but this is all the money i had saved for the mac so i need to use the same money ...

Please advise,

Thanks in advance