Mia is it possible for you to have a friend or family go with next time? They can intervene and let this person know there is no reason for that behavior! That way you can not feel as though you have to defend yourself. If the case worker continues to be abusive ask to speak to their supervisor immediately. Let the supervisor know abusing a disabled person is against the law!! See the Americans with Disabilities Act!! If the case worker refuses to get a supervisor finish the meeting and seek out The supervisor before you leave.