Hey Isoris,
Thank you for reaching out to us!
You can customize the email with a template override or by using the filters we have available. The original template for the email with the purchased tickets is on:
event-tickets/src/views/tickets/email.php
You can override this template in your own theme by creating a file at [your-theme]/tribe-events/tickets/email.php
You can use our Themer’s guide for detailed info > https://theeventscalendar.com/knowledgebase/themers-guide/
I hope this helps! If you have any other questions at all please feel free to let me know and I’d be happy to help as best I can!
Cheers,
Patricia