Maxima Machineries HR- Management Trainee interview questions

I applied through their website, and I immediately received an interview date. I went on the day of the interview date, it took quite a while before HR called my name for the interview. She took me to a conference room to conduct an assessment. What HR told me is that they must first conduct an assessment for the applicants before proceeding with the initial interview. The position I applied for is HR Management Trainee. I have 3 exams that need to be taken, Otis Lennon Mental Ability, Flanagan Industrial Test and Sack Sentence Completion Test. I started taking the exam at 9 or 10am but after I completed the two exams, HR did not come back to check if i'm done with my exam, she made me wait for almost 3 hours because she had a "MEETING" I feel like she wasted my time and I haven't had lunch yet at that time I just wasted my time waiting for him for my last exam. His image to me was unprofessional because he didn't even tell me that she had a meeting.