Hi, webquarry. Thanks for asking about this customization.
As you know, there is no way, out of the box, to check with Eventbrite about the status of your event’s tickets. I would guess that to accomplish this you’d need a strong understanding of the Eventbrite API, and that’s, unfortunately, outside the scope of the support we can offer in our forum here. If you would like to pursue this with a freelancer, we’d be happy to share a list of folks that we trust to help you out. 🙂
Sorry I can’t resolve your issue for you. Good luck finding the answer! 🙂