Bad service and communication

At the walk-in dentist with my daughter.Phoned during the week,to ask for an appointment,which they don't do,receptionist said I have to be at their offices before 9 in the morning,now that I am actually here,08:50,to be told,they only take 6 people on a Saturday,which was not communicated as such,also on the adverti*****t it stated,dentist hours on a Saturday 09:00-17:00,Appointment only,which is then very misleading according to me.I am so ****ed-off right now.The fact that the receptionist talk as if she's speaking with a child,****ed me off more,I am an adult and this thing of talking loudly so that everyone can hear in the waiting area,does not sit well with me at all