I try to call them for more than 40 minutes I fall...

I try to call them for more than 40 minutes I fall on the answering machine then they are supposed to be open until 5.30pm (see timetable above) is this normal ?!

Being in a public park with children who want to go to the toilet, go there to see the opening hours (9h 19h) and find them close. Is this normal? I do not think so.