Don’t follow appointments

I booked an online appointment for 4:30 pm. I got there at 4:12pm and the receptionist told me the lady just left. What’s the point of saying you close at 5:00pm if everyone is going to be gone by 4pm ? While I was standing outside my reminder for my appointment email popped up 🙄. So disappointed because I rushed from work and spent money to get there just for that to be my experience. No one even bothers to call and let a person know.