Annoying 3rd cousins!!!

So my mom’s cousin is from england, rite? And she has these kids, who are my third cousins. Ugh. The girl is 7, and the boy is 9 or 10, I can’t remember. who cares. Annnywayy, the girl is the most annoying. Whenever she comes over, she gets all my makeup and gets it all over my floor, and draws on the walls, and spills my black nail polish all over my very nice, not to mention expensive, white carpet. And guess who has to sit and clean it up? Me. And my mom gets so angry at me, and says I’m ot responsible and I don’t take care of my things. She also sits and calls all my friends on my phone, and I have like, 300, and uses up my minutes, and rollover minutes! She gets my hair scissors and cuts up her barbie’s hair and gets it everywhere, and I have to vaccum for like, 3 hours. My mom just says she’s young, and she doesn’t know any better. There’s a diff between 3 and 7 years old! I tell my mom about all this, but she just get’s angry and says that I deserve it, since I’m ‘so mean to them’ like, f her. (sorry about the bleeping, I mite get in troublee lol) I can be a really big b sometimes, but I know when to calm down. She just doesnt respect my things, my life. I’ve explained over and over, but she and my mom just don’t listen! Pleaseee help!! I know it’s long, but it’s the truth. :(