What a nightmare, I feel really sorry for you! Is it not always impressed upon US as the STUDENT to keep our paperwork bang up todate and that the PIC should check ALL paperwork before a flight??? Whenever I do my Skills test, I may jsut check that all the examiner's paperwork is in order. He may think i'm barking but...
We have had issues over club aircraft paperwork found to be wanting. So I suppse everyonie can make a mistake, but when it comes down to someones Skills test and the issue of a PPL, I would have thought it was even more imperative that all paperwork was thoroughly checked before the flight.
Well, good luck with your quest for justice, and even better luck with your next skills test.