Nationality, Immigration and Asylum Act 2002 (Juxtaposed Controls) (Amendment) Order 2006

If the complainant is not satisfied with the reply given by the chief immigration officer, to whom does he go? We were told that his route of complaint would be, first, to the chief immigration officer and then, if he was not satisfied with that, to the monitor. If no monitor has been appointed, to whom does he go when he is not satisfied in the first instance?