Ignorant, self entitled female driver & her parking

'Lady' decides to park her car at the front of the goods loading bay when there was plenty of space else where. I sound my horn to let her know I wish to leave and her response was enough for me to know where this will go. She moves her car in to a space where there's at least another cars length behind that would've given me ample room to exit but no........She had a point to make. She watched from the store door when I was millimeters from her front bumper