Came at 1820, the place was open and there were 2 ...

Came at 1820, the place was open and there were 2 workers inside. Asked them that I want a photo. They said "we're closed, we work till 1830, it's written on the door". I said it's still 1820 and we have 10 minutes. It's enough to take a photo and to send it by email. They still refused. Worst service ever.