We changed our parking to short stay two days before we departed at an extra cost of £14.99. When we arrived at the short stay an operative refused us access as all spaces were 'full'. We advised him that we had a space reserved only two days before but he was not prepared to listen. We also advised him that both my wife and I have mobility issues but again he told us we had to park in the long stay spaces. I refused to do this and asked your operative to speak to somebody else but he refused. I then told him that the sign at the entrance to the car park also said there were vacancies so I was just going to enter the car park and check. He was not happy with this but we drove into the car park and found a space within 30 seconds. Looking around there were at least 9 other spaces that we could see from where we were parked. Whilst we did get to park in the short stay the argument with the operative was a disappointment and spoilt our departure somewhat. Why do you notify and sell short stay tickets to customers and then tell them on arrival that you have no spaces due to the construction of the new meet and greet facility which you knew about when we booked.It really did spoil our departure.