if you've cleared your browser histories (cookies, mainly) and it persists and bothers you, you can try to force a new ip from their dhcp. process would vary depending on what gear you have. at home, i use my own and only need to give the router a different wan mac and reboot the modem. with their gear, might need to just unplug the stuff overnight or something as i dont think you can get at the settings--hell, you need their stupid app to change the wifi password.

but like i said, i'd just let them deal with it. it probably only affects their own determination of your location. if it does spread elsewhere because they're 'sharing' that data with others--just roll with it. i actually love it when we hop on a weather site or something and they're way off, like michigan or missouri.