Receiving money back from an international transaction

Hi,

I made an international transaction, payment to a supplier.

The money was removed from our account and accounts obvioulsy reconciled.

One month later the money was returned to us due to an error with the receivers account.

I now need to receive the money back, and then show that the supplier invoice infact hasn't been paid and is still outstanding.

How do I do this as I simply can't reverse the transaciton, because it is reconciled and did not have the money for one month.  Now I need to put the money back, and pay the invoice again.