Got my hair cut about a week ago from a girl there...

Got my hair cut about a week ago from a girl there. I have a medium/longish hairstyle and was looking for a trim off the sides and back and even showed a picture. She took a quick glance at the pic and began chopping away. It is now uneven /lobsided and longer on one side. When asking for her (professional) opinion she became a little hostile saying I should know exactly what I want. (I'm not a professional hairstylist) Also just tried to sell me very expensive products. Very little conversation and for the price a bit shocking...