It sounds to me like you're a smart, determined and caring man who wanted to help his deadbeat parents and unfortunately got burned from it.

Listen to what others say and realise that this isn't your fuck up, you did a good thing and your parents are the fucked up ones that took advantage of their child and straight up lied to his face.

I saw somewhere you said you can't get a job because they use the money that you get and you wouldn't get it if you had a job but seriously, fuck them...

Use that same determination you have for getting the coins back to make sure you can move out as soon as you are able to, get whatever job you can get and save your ass off... Don't tell your parents how much you earn and don't let them have any of your money. It's not your fault they are in the position they're in and you shouldn't let them fuck up your life because they fucked up their lives.