Booked from a link sent to me as I have used air parks regularly. Only to find I was booked into the flying scot. They as it happened were FULLY booked . The woman in charge stated " don't know where everyone is going to really busy " Eh if we weren't travelling then you wouldn't be earning money !We were bumped to a low cost parking area they have roughly a mile from their main parking depot. We really had no option but to let them drop us off in my own car then allow them to park it NOT IDEAL ! We were instructed what to do on our return as concerns telling the driver we were to be taken to low cost parking for our car . Not happy but was determined not to let it spoil our week . We returned today phoned the number as instructed followed the instructions to leave our name and proceed to terminus 5 . You couldn't leave your name as the message machine was FULL ! We proceeded to terminus 5 to see the bus pull away. I then phoned at my own expense to be told we are a bit busy and a bus will arrive shortly. 15 mins later in the rain it arrived. The driver said he had to got to the main office as low and behold " it's a shambles and we are over booked by 50 cars and they have to follow me to low cost" as it turned out no one followed him because after waitin 20 mins he left due to a major snarl up with traffic in the main parking depot . When we did get to low cost after another 45 mins waiting cause they had no record of my car being there and eventually managing to get the guy on the phone at flying scots main depot we were told the car was there at the main depot all along ! A shambles!!!! On the whole a worse performance I have never had the misfortune to experience we were over an hour and a half late in returning home . Some CUSTOMERS didn't wait to be parked and went to the long stay at the airport itself. As your records will show I've used air parks for my parking a lot in the past.I may infuture just get dropped off and picked up by a friend or family member. I do not blame the guys working there but the greed of the people running it. They knew they were over booked the day before we flew so should have emailed or phoned to give us options on what to do. Not doing so tells me they are extremely incompetent or greedy or both . I am contemplating further action as it's a disgrace with modern communication as good as it is not being used . I was led to believe by a customer leaving this morning that parking at low cost is cheaper than at the main flying scot parking area . I intend to look into this soon . Regards Gerard Tobin