As your bookings are secure, we are unable to go into these and change it in any way. For you to change any part of your booking you have two options
1) There should be a link in the confirmation e-mail that you received. This link will enable you to manage/alter your booking. You will be able to change the details of your car and flights there.
2) You can give us a call on 0871 360 2738 and our staff will be able to do this for you.