It worked.
Thanks, everyone, for your sound advice. I called, and the guy I talked to did a lot of thorough checking. Explained my bill got yanked so high because my promo ran out from when I'd signed up last year. Okay, but I can't afford $85 for standard internet. LOL He understood and did a lot of research to see what he could do to bring my bill down lower.
It's now $44.19 a month. He couldn't get my WiFi free anymore, it's only $4.95, which I can afford that.
The whole call took 20 minutes. Including hold time, including the little bit of time he had to put me on hold to figure out a code that Insight had put in Way back when I'd signed up, including the research he did. And he was thorough. I'm very pleased.