Hello, I would like to ask about an already identified non-urgent appointment or administrative matter in Barcelona: [specific request]. The type is [first appointment request / change to an existing arrangement / administrative document enquiry]. Please identify the appropriate contact channel and centre, the identification information needed, how to submit it and how I will receive a reply. If an appointment is involved, separately confirm the date, location and any confirmation steps I must complete. If you have only received the documents, please state that processing is still pending. This is an enquiry, not confirmation of an appointment.