After returning from a delayed flight of 7hrs from Larnaca airport on 27th September.at 5.30 in the morning, I called to collect my vehicle from the long stay carpark.my wife had called into the office at the gate to sort paperwork out. She returned to the car which I was in a queue of around 30 cars. There was nothing moving a woman was stuck with her car. She had to get out of the car put her hazard warning lights on and went to the office to try and get someone.This lane was now completely blocked and nothing could move. The outside lane was also struggling as people had trouble getting cards into the machine which I sympathize with as it has happened to me in the past. There is nothing on the cards to say which way they have to go into the slot and what way round which confuses people, more so when it does not work sometimes even when put in the correct way. After waiting for 15minutes a guy came out on the outside barrier and started to put the cards in the machine for drivers, which began to clear the congestion. I waited in the inside lane for a further 5 mins waiting for it to clear.As I was waiting two people were outside the office in a very heated discussion over the cards. As the lane was clearing on the outside I moved over into it and started to approach the barrier when I received a mouthful of verbal abuse from a guy in the car in the inside lane which was very threatening and could of led to an altercation. I eventually got clear after around 20 mins and found this a very negative experience more so after a 7 hour flight delay.I would normally accept this as a one off but after using this car park for several years this has been an experience have witnessed before especially with the cards. In future I will be looking at alternative means due to the experience I have had. Regards: John