As you will appreciate I did not use this booking as flights have been cancelled. Might be worth considering how you get feedback at this time. I understand that the booking was not changeable but many businesses have been very flexible about this and the least you could do is offer a substantial discount on a future booking. I think that this approach is in keeping with the way that you constantly extract more money from parking with no improvements. The machine for payment on exit still didn’t work when I last went and not installing any payment machines in the pick up area is ridiculous.