netherlands – Anne Frank Museum Amsterdam Tickets

I was trying to book 2 tickets for the museum (24th or 25th July) but their website says all of them are booked. Even though there was more than 1 week left when I started checking. Can we get tickets on spot?

Is it possible that we go there and might be accommodated if someone who hasn’t bought the tickets didn’t show up or something? How many tickets do they have per day?