Sally Beauty Supply review: employee behavior

I went to Sally's last night and arrived at the door of Sally's at 8.54pm. As I was walking up to the door the employee was locking it and walked away. I knocked on the door and she kept walking to the very back into the "employees only" door and closed it.

I called the store several times back to back and she wouldn't not answer the phone.

Since when does a store advertise to be open until 9pm and out of convenience, close 6 minutes early. Stay open until your advertised time and serve your customers.