Caller display help

[#1]

I now have caller display which I know is only 99p a month,  but my point of having it was to know when a call was from one daughter who lives in Ireland or the other lives in Spain.  I needed it because I get so many spam sales calls which always show as international on my phone, but my two children also show as international so I never know if its a spam call or one of them.  Is there a way to see their calls differently.  I am registered with the TPS and it seems to  make no difference I still get sales calls, at least three every day.

[#2]

it is a problem, TPS cant stop international, and I assume it is  Eire not being BT it shows as international

[#3]

I have the same problem, with two offspring abroad.
The official BT line is that they don't pass on the CLI on calls from without the UK because they can't guarantee its accuracy. Seems odd to me - surely anything is better than nothing, and I can't believe the inaccuracy would be that big a problem.

[#4]

If I'm expecting an important call from a certain government department I have to answer all 'Withheld' calls which are usually spam calls because the important call also withholds their number
Incidentally my Daughter is currently on holiday in Turkey and if she calls my land-line it will show 'International', another source of usually ignored calls as mentioned above.