Which is fine, but I have been going round in circles from this very link, since, as explained in the original post, we are supposed to be able to apply online, but can’t (for reasons I have given, their site does not allow you to attach all the required documents), neither can we make an appointment, nor contact them by phone…
I think we are just going to have to bite the bullet, take a print out of all the docs to the Prefecture without an appointment and throw ourselves on the mercy of the reception staff to let us in and accept the dossier