Check you Outlook email account with the company. The ticket numbers would have been sent to that account ( pre-iJourney ). When you do an electronic refund there should be an email sent to your outlook account immediately. If not, the system has not captured your refund request.
I had the same problem with refunds of e-tickets and was told to do the refunds next time I'm at CX city or do a manual refund form. Something to do with CX intranet and not capturing tickets if using external computers.
I would have thought there would be more information on this as it has been a problem for awhile.