sea witches

This story is about 3 mermaid witches of the sea, and they were kidnapped as children. They try when they are grown up to escape the humans, and all they want is to get back to sea to there real families. There new families lock them up and savagely beaten. There are in separate room's so the mermaids cannot see each other again but using their magic they try to break out. There names are Adel, Raven Cordelia.