Ch@ve access

Hi, we have a property in Calonge which is sometimes rented out. We need to get access to the Cl@ve system. We have the NIE, but need either the NIE support number, which isn't on the NIE document we have, or a Cl@ve PIN, which it looks like you can't get without the NIE support no. Anyone have any idea how this works? Do we need to present face to face, and if so, where? Many thanks. Rick