Sorry to see this, @Sheila!
I cannot recreate his issue, so there may something unique going on with your specific site.
To see if that’s the case, I would recommend first updating The Events Calendar, Events Calendar Pro, Event Tickets, and Event Tickets Plus on your site — it looks like you’re using version 4.3.1 of these plugins, but this is outdated.
You can find all the most recent versions at http://theeventscalendar.com/my-account/downloads
1. Update everything to its most recent version, and let us know if that makes any difference here!
2. If issues persist after updating all plugins, then try updating your version of WordPress itself. You’re running 4.6.2, but the most recent version is 4.7.1—try updating to version 4.7.1 of WordPress and let us know if it helps at all!
As for the location of the tickets email template, it can be found here within your plugin files:
event-tickets/src/views/tickets/email.php
Learn more about using templates in our Themer’s Guide here.
— George