Sorry about your wireless issues. I was going to enquire about what frequency your TV connects but I see that's irrelevant as your Hub can only connect on either/or (2.4GHz/5GHz) and not both simultaneously.
As you have an outdated Hub I have ordered a replacement for you. Please connect and activate it in accordance with the instructions that will be included in the delivery. If you continue to get problems with the new Hub please post on here and I'll take another look for you.
Here are the replacement Hub details:
The new Hub should arrive within the next few days.
The courier, Yodel, will leave contact details should re-delivery arrangements be needed.
A text will be sent (to the mobile number we have listed for you) the day prior to delivery advising of an ETA.
Full setup and activation instructions will be included.