Shopee Cross Border E-Commerce interview questions

The HR is completely unprofessional, maybe she is too young I don't know but at first everything was okay then coming to user interview, she was the one who kept changing the day and time until the day we agreed for user interview, there was nothing happened, no one gives the information nor email and she just messaged me 2 hours later to move the interview to another day, how stupid was it? I Completely wasting my time and I had fully prepared for that user interview and when I was another day (because I had many things to do) she never replied my message and disappeared. Completely worst experience. the initial name of the HR is SA, based at Jakarta office, if there is a senior HR here, you have to look carefully for your employees.