On Tuesday 9th July, I had a ticket for your 12.10 service from Belfast Glengall St to Dublin Airport. On arrival, there was a coach where your coach normally leaves from. I joined the queue. At 12.10 your driver drove past, having left from a location further up the street. There were several people in the queue who also thought they were queuing for your service. Your driver beeped his horn in annoyance on the way past knowing that another driver had taken his spot. Yet he did nothing to check that there were none of his customers mistakenly in the wrong queue. I and several other people had to then go and make alternative arrangements to get to Dublin Airport. Very poor customer service