Right, let's start with basics... you need to follow the school complaints procedure, ask for a copy when you are next in school, although it should be on the school website.
It will talk you through the process and you will need to follow this... eg, issue with a class teacher, then talk to teacher first, if it is unresolved then onto head, still not happy, then formal complaint which is investigated, still not happy then governors... still not happy appeals committee... still not happy then SoS for Education. BUT you have to work through the process as you will be referred back to it each time.
It would be unlikely that it would ever be published on a website, it is between the school and the complainant. Ofsted, would be unlikely to look at this unless there is a major issue, eg safeguarding.