Is OTHER wrong in the post ? POST : Because of serious family problems, I’m living with my grandmother. I’m a minor. She doesn’t have legal guardianship.

Now that that’s out of the way...

I want to buy a new phone cuz my current one sucks. I have more than enough money to buy it, but my grandmother isn’t letting me. My money isn’t in a bank or trust fund. I told her it’s my money and she has no part in deciding what I spend it on.

Was I being an asshole to my grandma, or was I right?