You are going to have to appeal against non-qualification, you need to read this : http://www.elevenplusexams.co.uk/appeal ... lification
this is the only way to get a place - the head can't do anything by going to the GS head - it doesn't work like that
The key to appeal is academic evidence, if there are extenuating circumstances then they can have an effect on the appeal outcome but only
if there is strong academic evidence.
Re happenings during the test, did you report these at the time? Do you know if they were mentioned on the invigilator's report? Mentioning them quite late on can mean they may carry little weight at the appeal..