Hi! I have just solved the problem following this link. Thank you very much
https://wordpress.org/support/topic/remove-facebook-business-manager/
Hi! Sorry for not replying before.
I have already disconnected the link in the Facebook WooCommerce dashboard, but I can not access to step “Remove the app from Facebook and system users” because the facebook account does not exist anymore. That is because I want to split apart de link between facebook and woocommerce so I can link woocommerce to the new facebook account.