@Emers1412 Who are you getting these emails from? Roaming only applies to mobile phones being used outside their country. Are you using a NowTV box/stick or a mobile phone to watch? If phone and its registered to a uk-based network, then you need to talk to them about why they think you’re out of the country.
In this instance, phone could include any tablet with a sim card.
Or did you, in fact, mean device limit not roaming?
If none of the above applies, the emails are probably a scam. Pop over to the online chat, and see what they have to say.