Wifi hotspot available - no internet

There is a wifi hotspot near my work that I've been using. Lately, it's been showing available but upon connection with my phone, the internet is not available. "No internet connection". I work in a metal building with zero cellular signal and the hotspot has been my only source of connectivity for at least a year. If it helps, the hotspot is near 1218 E. Highline Ln. in Mustang, OK. It shows available on the cox website and again, the hotspot shows available with adequate signal strength but no internet connectivity.