I don't know what to do

I wanted to go to a concert of a band i used to be obsessed with 2 years ago and asked my parents if I could go with my aunt. I can't spend time with her because she's a lesbian and they think she's gonna convince me to become one aswell. I stuoidly thought that maybe just this once they'd let me, since that would be the only time this year we'dbe out alone. My dad began telling me how he doesn't want me around her and shit like that and then said he and my mom would go with me to a different concert. I said that the other bands I would be interested in only perform in England and in America and that I don't think they would wanna waste money on flights, hotels and concert tickets. Then they began telling me very angrily that i was spoiled and how I think we could afford that in this economy (as if I was actually serious and not just trying to make a point.) Then they said that world war three is coming and that we need money to survive and not waste it on concerts. (Yesterday they said that war isn't going to happen). I'm seriously upset and have no idea what to do. It's not just about the concert but about them trying to control who I talk to and spend time with. Is it even worth trying to talk to them and help them understand me anymore? I just don't know what to do and how to handle this. (I'm 18 and wanted to spend the remaining money from my birthday on this concert if this is even relevant. One ticket is about 50 dollars)