New router installed now I cannot set up any new devices to wifi old ones work fine

[Magster75]

Since having a new router installed any time a new device needs to be connected to wifi , using the correct password

it doesn't work. This never happened with the old router.

I have had two 35 minute phone calls with VM one just to set up a kindle

[jbrennand]

Try this reset ....

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Note that a pinhole reset on a Hub3/4/5 can be a bit problematic - so do it EXACTLY this way (not as the VM website says!).

With the Hub switched "on", and co-ax still connected, push in the “reset pin” with the end of a paperclip/thin nail/SIM tray “tool” or similar (bigger items like ball point pen ends may not press it in far enough) until you feel it at the “stop point” and hold it there firmly for a "timed" minimum of 60 seconds do NOT manually restart the Hub at any time.

Leave it 5' or so to initialise and then your passwords/passphrase for both the Hub settings and the Wifi networks will revert to the two printed on the Hub sticker on its base. The SSID and passwords will revert to those on the sticker too. Make sure you use the wifi one for devices connecting to the wifi and the settings/admin one to access the Hub.
You will need to reconnect your devices if you had changed the password, or just change the password back to your preferred one.
See if that sorts it.