My family gossips about me! Please help.?

My dad and my aunts get on the phone with each other when they think I'm not paying attention, and they talk about everything that I did that day. It's not only disrespectful, but also an invasion of privacy! Sometimes, they go through my room, and tell each other how clean/messy it was and if they saw anything suspicious. If I tell my dad something that I don't want my aunts to know, he says he won't tell them, but the next time I'm in my room, he calls and tells them. I feel like I can't trust anyone anymore. How can I stop this, or at least monitor their conversations? I'm only 13, so there's not much I can do.