iExpenses Duplicate data

Hi,

 I have a user who has uploaded September's iExpenses, and 

run the XXAP Load Barclaycard Credit Card, 

then the XXAP Match Employee Barclaycard Credit Card and then

run the Create Credit Card Invoice, 

however, she inadvertently uploaded the wrong file and brought in  July transactions and not September as intended, can you please advise

if it is possible to roll this back considering it has now gone as far as creating the credit card invoice? if it is possible could you please advise how to do this?

Any help with this would be much appreciated as we don't know how to back this data out so we can re-load the correct September data.