When ever we go over big bumps it creeks, so i went to press on the rear and front to see where it came from, when the boot is closed it creeks, but when i open the boot and press on the rear bumper area or the sides it does not make that noise, anyone else had something similar ?

Once had a Ford focus hatch 2006 that did that. In the end they had to spray foam inside some of the rear panels. Could be boot rubbers, tried some silicon spray on seals? Could remove rear bumper and assess if it still does it if you can do that safely...