N300 EX2700 won't connect to router

[Shinbu]

I just bought the N300 EX2700 WiFi extender but it refuses to connect to my Virgin Media Hub 3 router. WPS always refuses to work. Tried using the online setup on two different devices and didn't work.  I've reset the router and tried both again to no avail.

[plemans]

virgin media has a few points about adding extenders to their devices. 

https://community.virginmedia.com/t5/Forum-Archive/Connecting-Netgear-Range-Extender-to-Hub-3/td-p/3...