I need someone to call me because I have a few questions about how to use booking. I don't know if i have to send a message or something, 

M Adamopoulou

Hi! -Manuelcovelo and welcome to the forum.
This is a space to chat and advise other BDC partners. You have to contact BDC support team through your extranet inbox tab and send your request or you can call your local BDC office.
Wish you luck...