On arrival at the airport long term parking - I followed the main stream of traffic and an Airport Bus - all traffic turned left - myself included. I then realised that I had followed vehicles to the Employees Car Park. Neverthess, I did find a number of vacant spaces in a nearby parking lot. I parked my car and then walked to the Bus Shelter to await the courtesy bus. I used the phone to call for the courtesy bus. It took a long time for my call to be answered. When it was answered and I told the Car Park Attendent where i was - I was told that I had ignored signs and had driven on the wrong side of the road to get to the car parking area that I had parked my car (needless to say several cars and the Courtesy bus had also ignored the signs). The attitude of the person was rude and objectionable. I asked him what shall I do? Move the car? He said that he will " arrange for the bus to pick me up "if there is space". I waited more than 25 minutes and no bus. I was joined by a number of other drivers who had also found their way to this car park and bus shelter. When I advised them that I had already requested to be picked up; some 25 minutes before, one of the Drivers used the phone to make a further request. The Car Park Attendant was perhaps the same person that I had spoken to; in that his attitude and behaviour was unacceptable and most certainly rude. Because of this response we all started to walk to the terminal........ as we had low expectations of a bus arriving to pick us all up and take us to the terminal. I have footage from my dashcam that shows how I followed the traffic stream to the car park. No evidence of a no left turn was evident. When walking to the terminal - we all noticed a cone and a 'small' insignificant sign. perhaps if the sign had been placed on the roadside prior to the left hand turn as opposed to being in the left hand lane AFTER the turn - then perhaps I would not have suffered the rudeness of the Car Park Attendant. Needless to say; this unfortunate encounter with your employee dampened the hoilday spirit of me and my fellow car park users.