My car came with a modem and was calling home. Now whatever wireless service it uses is no longer available. My car has been telling me it couldn't connect and

My car came with a modem and was calling home. Now whatever wireless service it uses is no longer available. My car has been telling me it couldn't connect and that it would stop trying but it never stopped trying. Apparently, I have to take the car to the dealer and pay them to disable the feature in software. I'm not finding any value in this.