The customer who are accessing Facebook to connect multiple users and sometimes the account does not access. In that case the services by FB services support team is available.
Facebook customer support for the issue which a user facing at the time of posting of any kind of staff, so user can resolve with the help of facebook expert fo a solution.
A user who is facing technical issue to their Yahoo mail account in accessing new version Beta. That user can take help with yahoo team so as to make secure.