Have you seen the instructions here?
https://community.talktalk.co.uk/t5/Articles/Using-Alexa-with-TalkTalk-TV/ta-p/2457651
You can also use the generic NetGem skill. I no longer use this but have successfully linked my box to both skills at one stage (but not at the same time).
I do recall that some people had an issue early on and had to reset the box to factory settings and it cleared the box of its memory of trying to pair.
Hope this helps.
Please remember to mark Solved Posts with Best Answer. Doing so helps other customers and saves TalkTalk's Support Team time by only looking at unsolved topics. Thanks, Steve (a fellow customer).
