At my kids school, we have 2 gates the main one and the back one so the back one is easier for us 10 mins walk only but the problem is they always forget to open the back door on time . School starts 8.45 and door have to be open at 8.30 but they always late and lots of parents complain but nothing changed and today we was standing outside for 15 mins waiting for someone to open the door and when we went inside the headteacher was there, we tried to complain and she was rude telling us if that door wss closed , we should have used the main gate which is another 15 mins walk from the back door to there and she wasnt even sorry but trying to put blame on us parents for being late and telling us is not her problem if the door was closed and she shouting at the parents to take the kids to the classroom . Is it anything else we can do or somewhere we can complain about it or we should just leave it and carry on as normal?