I arrived to a low queue of 15 people maximum. The driver told me I had to buy a ticket because the card machine didn't work and he couldn't accept cash. I went to the ticket office who refused to sell me a ticket stating the bus had already left so it was impossible to do so. The bus was still there and people were still getting on the bus. I asked for further explanation from one of the aircoach workers why I couldn't get on the bus with cash or card or with a ticket and the staff member became extremely aggressive, almost confrontational, stating they also have to cater for terminal 2. By the time the bus left, it was barely half full. I have used this bus for years and never encountered this before and it was disgraceful behaviour from the staff member. Welcome home. Never again, Dublin Airport Express is better.