If they make mistakes

Ive recently been for an assessment for esa that i was told a week before would be recorded so i had the assessment and then find that the examiner ,deciscion maker and the person who called me with a decision had obviously not read my notes or medical evidence as it wadnt recorded and then they have the cheek to make me try and go to another assessment less than a week after id got the phone call when i was in pain and suffering the first time i had to go and i feel i cant trust these people as this is the second time ive had problems with these people at assessments for two different things are they allowed to do this when ive told them how it affects me to several people and they have evidence from consultants and  my doctor has said on certificates that im assessed as unfit for work