how can i talk with the support of the theme?i dont have pursache code.

Envato Customers Purchases and Subscriptions
1

​I dont have a purchase code, because i download the theme of envato elements. to talk with the desarrollo of the theme (themeREX).

2

You can via his profile contact form, however, please note that the author is not obliged to help you in this case, since themes from Envato Elements do not come with the support.