Pablo,
I took a look at your site and see what you are trying to do and can help you get going in the right direction.
I would recommend using the tribe_get_events() function:
https://theeventscalendar.com/support/documentation/the-events-calendar-template-tags-general-functions/#functiontribe_get_events
If you follow along with the example and change the ‘eventDisplay’ to
'eventDisplay'=>'past'
That will get you past events, then you can modify the query accordingly to get the latest past event.
Let me know if you get stuck somewhere and I can help out, thanks.