That's not how that works.
It's just a run of the mill f up. You return it and get a refund. You don't get to keep it.
well here's what you CAN do.
ordered pair of new mexico slim online-- waited 5 days - no news
where's my jeans?
oh we have to cancel-- no one has them
here's $20 for your troubles
call NY store
do u have new mexico slim in my size?
why yes we do and they are 30% off the sale price of $159 marked down from $390
$112 + tax
why thank you