I'm so frustrated with my parents, I'm always getting into a shouting match with them.
Why are you so frustrated with them?
They don't tell me what's really going on and it really bothers me. They don't listen to anything I say.
You still need to respect your parents, even though they're frustrating you. Try to remain calm and tell them how you feel.
They won't listen to me if I speak in a normal tone of voice. They only listen when I yell.
It sounds like they are difficult for you to interact with. Try to find better ways to communicate that don't involve yelling or raising your voice. Try to keep everyone calm so that your conversation can be more productive.