Ah bummer, but hey shit happens we get it.
If the package has already shipped, meaning a label has been created, then you would be responsible for contacting the shipping carrier to make the change.
If the order is returned to sender, we'll refund it to the original payment method.
Generally, your best choice to get the item to you the fastest is reordering, using the correct shipping address.
We will not cover a reship for an order that is delivered to an incorrect shipping address, so be sure you're not fat fingering in your addy.