To troubleshoot why your internet is not working on your office network, check the following:

1. Check if the router and modem are plugged in and working properly.
2. Check if your device is connected to the correct network.
3. Run a speed test to get a better understanding of the connection.
4. Ensure the firmware for your router is up-to-date.
5. Reset all of the network components: modem, router, and device.
6. Ensure your device's network settings are accurate.
7. Check your device for any spyware that may be limiting the connection.