I had something similar, except there was no hardware. They just tried to charge me for using my own router. It was a nightmare to get that removed from my bill, even with the agents going “yeah I see we didn’t leave anything, and your installer verified with our router and took that, but I also see it was shipped to you directly, so there’s nothing I can do”

Like cool, but nothing was actually shipped to me and even if it was that’s not my problem, it’s yours.