On demand content uses the standard internet, so things like Iplayer and other on demand content are streamed. Live internet TV channels use a protocol known as IGMP. This data is slightly different and if this is not being processed correctly then the service will fail.
I've been testing your line and am seeing high errors. I know you have had 2 new routers recently so this should not be a hardware fault.
Is the phone line clear with a clear dial tone ?
Do you only have the router and phone connected to the phone socket ?
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After yet another week of no internet due to the line failing, I am now back online, phone line is clear, and they said the error was the connection from the green box, but as of yet I still can not access the channels. Its strange because I could use them one day and not the next they literally just stopped working all of a sudden, and this was before I even moved to this property on 03/02 I have had this issue with the channels since 22/01