People debating you about your demisexuality

I’ve been talking to someone for a few days who keeps debating my identity. While I don’t experience instant attraction, I know what I don’t like. I am now completely disinterested. There’s other stuff going on in the convo that’s unacceptable. I’m getting ready to block them. I feel bad because the person I really liked (rare occurrence) ghosted me repeatedly, but I am truly disgusted with this new person’s behavior. I think some folks think debate is a form of flirting.

Has this happened to you? How have you handled it?