Closed at 15:30 website states 16:00

I wanted to get Chippies for supper, checked the Website for the closing time of Observatory branch and it stated 16:00. Walked from work at 15:15 and go to the branch at about 15:30. They had the closed sign up but were still inside. The guy inside just signed to say that they were closed. I signed to say that their Website stated 16:00 and he just shrugged his shoulders and walked away. I was hoping that I would leave, which I was not going to. He then came to the door and said that they were closed. I advised that the Website stated 16:00 to which he rep**** that we close at 15:30. I then told him to change the Website then because I had walked 15 minutes to the store only to find that they were closed early. He just closed to door. This is disgusting!!!