It will take some time but my suggestion is make some phone calls. Expect to wait a considerable length of time to connect with a person but should be worth the effort. I had to wait almost an hour for a phone call to Air New Zealand to change a flight that was cancelled to a new flight. Was worth it in the end. I used my cell phone for the calls as it was easy to put on speaker and then set the phone down while I played on the computer while waiting. Make sure to have all data that might be needed. Not just the PNR but the ticket numbers. Ticket numbers end up being much more important than the PNR for refunds etc.