You can't have two SuperHubs on the same account.
Your best option would to get a pair of
these and one of
these and
this. This will then give you a wireless connection in your room but connected back to the existing SuperHub, and the switch will allow you to have a wired connection.
So it would go SuperHub > Homplug > Homeplug > Switch > Wireless access point and PC
It may cost around £100 to do, but long term it's certainly cheaper than a seperate broadband connection