I'm so sorry That must be soo hard. My friends dad did the exact thing to her with her dog. She, her whole life, wanted a dog SO much and when she finally got it, he took him away while she was at school. I really don't think parents should do that, you should, if you have to get rid of them, be able to say goodbye or w/e..I would die if someone did that to me and I didn't get to say goodbye
Also, you shouldn't say that about your family, you might not like them right now but you shouldn't say things that sometimes you might not be able to take back just because your mad at them