Unpleasantly showned away from Restaurant

We went to Little Italy on Monday, 17 August 2015, at 20:15. We were shown away by either the security guard or car guard. He stood in front of the gate and refused us access. We told him that according to the internet and a telephone call to the restaurant, that it only closes at 21:30. He still denied us access and told us that the restaurant is now closed. Please do explain how you could change your trading hours as you please and close the restaurant an hour before.