I felt the cost was expensive. I parked my car without any issues but when leaving the car park on my return there were a number of issues. First of all, even though you do give details of your flight the bus does not return to the airport unless you call them. Once I got my car I proceeded to go to the gate. Because I had pre-paid it should have been as simple as put your ticket in the machine, the barrier would then open and then I would drive out. This was not the case! Once I had entered my ticket it came up saying that I would have to pay an extra £21.50 on top of the high price already charged. So I got out of my car and headed towards the customer service building. On my way there I got a shout from the bus driver saying that there was nobody in the customer service building anymore. He looked at my ticket as they have had people use the car park in error but on checking I was in the correct car park. I then went back to the barrier put my ticket back in and pressed the help button where I got a reply. I told them the situation and they immediately said that I was in the wrong car park. I stated that I had followed the map that was given when booking which is on the online receipt and then also stated he bus driver had also confirmed I was in the correct place but the person still stated that I was in the worng car park. I then asked to speak to a manager that could help and got a rude response. After again stating the situation the manager asked if I knew someone which I replied that I didnt. They then proceeded to state that someone else had used my registration to book their car in and had already left which had caused the issue. They then proceeded to open the gate and let me leave. This could have all been sorted out in a much better way if they had had the customer service desk manned. Very poor service when there is an issue!