Please help, how can i go about correcting my underbite?

So I am 14 and I have an under bite, I first found that out a little over 2 years ago by an orthodontist. He said there where 2 options to fixing it which where either A- Jaw Surgery or B- Braces, but I remember he had said that since I was still growing, that it was probably best that I not proceed with either just yet and to check back with him in a year to see if I was ready for it. Well its obviously passed that time and I still have not seen the orthodontist, I haven't even been to the damn dentist since then either. Why? Because my parents are f***** lousy when it comes to my dental work. Its like they don't care. My mom likes too feed me this BS telling me there is nothing wrong with my teeth when their obviously is. I have very, very low self esteem because of my under bite, I feel like an outcast, I feel ugly, no matter how much I try to explain that to her she continues to ignore me about it. My dad is just a selfish mofo who is never here(he has money), and when i do beg him about it he completely ignores me. I swear my parents do not care at all about it. Plus I think I might have a cavity because one of my teeth keeps hurting when I eat something hard or sweet, so i definitely want to get that checked too. You have no idea how bad I hate having this under bite, even though it is not severe, people tell me they never notice it until i mention it, but i still hate it. Because I know its only going to get worse as I get older and I'm trying not to get to the point where they have to break my jaw open to get it fixed, but even at that I heard those are not always successful. Please help me, I literally feel like killing myself every time I look in the mirror. How can I go about getting dental care if my parents refuse to do so?