Hair strengtheners will help you. Since you are in the awkward growing period, you may have to wait a bit before you can properly style it. Keep in mind that it could also be the natural texture of your hair. Sometimes those anti frizz and straightening products don't work. For example, my mom can use a product that will do nothing for either me or my sister and vice versa. You have to sort of learn about your hair's texture and experiment a bit before you find the right solution because it differs for everyone.
Believe me, I feel your pain because I still haven't discovered what works for me. My hair is fairly straight, but the ends curl and twist. It's really frustrating because nothing works on it, except for a hair straightener. I'm just going to continue growing it out until it gets past shoulder length and then I'll get a trim.
Sorry I can't be more helpful, but I'm lost in this area as well.