Bumper to bumper ****ers

I bought spares on the 30th December for a 2010 Honda Accord 2.4 upon arrival of driving 200km to and from the store, the parts supp**** are wrong, returning the parts that are wrong supp****, I am charged 10%, I don't understand the 10 percent when I have told them exactly my car specs, the ****** cashiers have a nerve to tell me he is helping me, when I am actually a petron to this ****** shop. Bumper to bumper the worst