That is very sad, but I know there are two sides. I don't know about Canada, but in the US, there are no laws that say a parent can't force a child to attend church. Basically, if you don't want to live by your mother's rules, you need to move out, get job and support yourself. When that happens, you will be the adult in your house and you will get to say what you do when. If this is true and not an exaggeration, you need to seek help now from the police, a teacher, pastor, adult friend or relative.