All the functions you've explained have problems, are services that use the internet. So the obvious thing to check is how your V6 is connected to your homehub - for it's that which provides the internet connection. Is it Ethernet cable or wireless? And if it's wireless, what's the signal strength?
Follow Home > Help & Settings > Settings > Network, and look in the top-right.
Live TV doesn't use the internet, and you've not mentioned problems with recorded or paused/delayed programmes - these use the hard drive.
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