Cheers for popping along to our forums; I am sorry that one of your devices is having issues connecting to the Hub; not sure why you feel a new Hub is needed at this stage?
Can you confirm a few things for us as I was a little unsure of the answers you have supplied.
How is the device that is having the issue connecting to the internet. Is this a WiFi connection or via Ethernet? You have answered but with a question mark so it seems you are unsure? Can you confirm that for us?
Is this the only device that is having issues connecting to the Hub and the internet connection?
Have you change your password at all to one that is different to what is listed on the base of the Hub? If so, you'd need to use the one that you have set.
I have located your account from your Forum information to attempt to go through additional checks but currently the Hub is powered off - please do switch it on when you can and pop back if you're still having issues.