Every day we get several calls from this and various other numbers asking for a non-existing employee.  After repeatedly telling this "gentleman" (with a very strong accent) that there is no one by that name in our worldwide directory we just began to hang up on him when he made his numerous calls to our switchboard.  Now they think they can trick us by having a female (again - heavy accent) call for the same person.  Well, that gets the same response - we hang up.  Maybe they need to figure out that if the person does not exist they should try a different name.