My friend has quite severe ADHD autism, though their autism is slight. They get DLA, about £500 a month. They're parents refuse to give it to them despite them turning 18 in 2 days, and abuse them when they ask for things or the money, and keeps getting told that the money is being used for their other 4 siblings, which I personally don't think is right. They get given £100 a month but often at times their parents will do anything to take more money. Since my friend has been about 11, they've spent little to no money on my friend and basically been making them pay £400 for boarding, often at times more when the DLA has spiked up a few months. Although my friend's parents only started giving them part of they're money a year ago, ergo they've taken quite a bit of money at this point, not saving any of it up for my friend or helping my friend with anything financially. I want to help them get out of the situation but I'm not too sure what to do myself, as I don't get DLA and this is all unfamiliar to me. My friend wants to either ask for all of they're money, but if refused, they're planning to move out, but as I think they're DLA is quite high, atoning to the severity of they're ADHD, I think they'll be forced to stay at home, making me feel concerned for their safety. What should I and my friend do?