This pretty much goes against the words in the bible (2 Corinthians 9:6-8)

"Remember this: Whoever sows sparingly will also reap sparingly, and whoever sows generously will also reap generously. Each of you should give what you have decided in your heart to give, not reluctantly or under compulsion, for God loves a cheerful giver."

Basically, it means you decide how much YOU want to give. Your parents could get arrested for abuse. But in the INC, sadly you can't file a case because it's a rule that a brethren can't sue another brethren or you could get expelled(idk it expelled or something else). I hate seeing that you're in that state rn, OP. I hope you get out soon and live a better life. I'm sorry for your parents, they are pretty much lost causes at that point. They have been brainwashed fully. There's little to no hope for them sadly