I have an Amex credit card that had a statement close with a $700 balance, next day I made an online purchase for ~$2500 and then had to cancel that order, so it refunded to my card. Now Amex shows a remaining statement balance of $0. Does that mean they credited the $2500 refund as a 'payment' against my statement balance- i.e. do I have no payment due this month now and the $700 will only be due next month (as $700 of the $2500 purchase)?