Hair is too short! What to do?

So I had my hair about to the center of my back. It was pretty long and nice, I went to the hair salon and asked for a trim and some thinning because I have really thick hair and a few long layers. What she ended up doing was butchering my hair, she kept trying to fix it, it took more than an hour! In the end she had ruined it, my hair looked like a mullet. So I had my sister who is a cosmetologist fix it, she said the only way was to remove the "tail" the previous hair dresser left. She did and now, my hair is ridiculously short! It's right at my ears :( I'm slightly chunky so it does not look good with my round face at all. Idk what to do! :(