Darrell, a Kobo guy, has been very helpful in cancelling people's orders on here. Email him:
ddiljohn@kobo.com
I had an order # and called Kobo to cancel, got "escalated." I tried to wait, but since so many people have had support issues, I went ahead and emailed him this morning. It was maybe 10 minutes before I got the email from him and Kobo that he'd cancelled it. Kind of feel bad for him right now!