We now need to ensure the router is correctly plugged in.
Your router should be already connected to the Optical Network Terminal (ONT). If not, check out this guide.
Take a look at the back of the router, look for a INTERNET or WAN port, if you have a MyRepublic Wifi Hub+ or D-Link router, these ports are show below:
Ensure the ethernet cable coming from the ONT is connected to this port.
In addition to that, if your router has a DSL port, make sure there is no cable plugged into there either as this can cause conflicts between copper/fibre.
The ports labeled 1-4 are used to connected your devices, like laptops or computers.
Has this resolved your issues?