You cannot. Once it is submitted, you have to wait. Just hope that you can get the list processed before the tickets you had expire in 2 hours.
Sorry.
Don't worry, you're not the only one that did this...4689 in line... :(
You have two hours of inactivity, so refreshing does reset that 2 hour timer.
Marian McBrine Event Coordinator Gen Con LLC
I understand it is any activity on the site (adding/deleting) would ensure you don't time out. It is if you leave the site for 2 hours that the cart will empty itself.
Yes, even refreshing the page is activity.