More context is needed, particularly to indicate what the correct translation of "presidente" should be. Is this the chairman of the board of directors, the company president, the CEO?--all are possibilities.

The new management "nueva administracion" is an organizational entity, not an individual person, so "who" is not appropriate in English.

Matters are referred in English - mail, e-mails, and phone calls, for example, are forwarded.

Also, the context indicates that referring such matters is a responsibility, a duty of the new management. The new management is to be contacted, because they are responsible for referring such matters to the proper person.