You sure it is the wheel rubbing and not the belly tray on the square speed bumps? You shouldn't be rubbing unless you haven't removed the arch screw.
Hope it's not the belly pan - defo the wheel arches or the inner lining.
Its the Audi a3 sport edition non s line so it's dropped already by 10mm. Just really strange all of this rubbing. Either will remove the inner rear lining or look at replacing the rear shock absorbers.