If you do not agree with a decision by the Examination Committee, you can lodge an appeal within six weeks of the date on which the decision was made. If you do not agree with a decision by the Examination Committee, you can lodge an appeal within six weeks of the date on which the decision was made with the Examination Appeals Board (CBE).
Further information: https://educationguide.tue.nl/practical-info/regulations-and-guidelines/complaints-and-disputes