Prepaid for parking in midterm. Because of an emergency had to stay at my destination two days longer than expected. Tried to change booking on line but could not because of the "nature of the booking". Tried the helpline but does not work at weekends! Pathetic. Used the email address to ask what the best course was so I didn't have to pay the standard daily rate so £ 32. Never even received a reply.) Rang the number on the Monday morning and after the third was basically told pat the daily rate. They would not know good customer service if it hit them in the face, they are just interested in extracting as much money as possible from people. If I could fly from another airport I would never set foot in this disgraceful place again.