I like the idea of contacting an agency devoted to helping immigrants from your home country. Even if you have not worked with them before, many have programs that focus on youth/parent relationships in the new country-there are often issues that come up and they know how to help navigate them. If you are a member of a church, you counld try contacting the youth pastor or whoever is in charge. I work at a church and we’ve spent more than a year helping a young man who was asked to leave HIS home. There are many, many services available to young people over 18 and under 25, but they are very difficult to navigate alone. Someone who’s been there might be able to get you going on all the paperwork.
Good luck-there are people who care out there!