"Unprofessional"

I've received a phone message that I need to book an appointment regarding my blood test.

I called next day after 10am to book at any day , but I was told that they do not book in advance and I need to call next day at 8am to book the appointment for the curent day . I called next day at 8am and I was told , that it is a routine apointment and I do not need to call at 8am. They have booked a phone apointment in 1 week . I did not received any confirmation. When I called in a couple of days to ask a confirmation, they told me , that it is not necessary a confirmation for the phone apointment. I was told that the apointment will be on Thuersday between 2pm-4pm. Nobody called me on the relevant day.