Thanks for your post on our Community Forums @Glissov, and a very warm welcome to you!
Sorry to hear of the issues with the setting up of the new Hub 5.
Can you please confirm if the service is now connected?
I've been able to locate the hub and this does appear to be showing as online.
Are devices able to connect to the hub both via wired and Wi-Fi connections?
Kindest regards,
David_Bn