We have just rented a car this morning to visit th...

We have just rented a car this morning to visit the Mycene site from Athens. It is noted that the site closes at 6 p.m. on the Google page. We arrive at 3 p.m. and ... we are turned back in a rather unpleasant way because the closure would be at 3 p.m. (see photo attached).
Very disapointed !!! Fake hours of opening / Very bad reception!