What I can't understand is how the old switch worked .. as the wall lights do not even have their own permanent or switched live!
I assume you have two cables coming down the wall.
So 2 reds and 2 blacks (and the earths)
Assuming that is the case:
The cable for the ceiling light you have sorted. And you have a link wire from one of them to the wall light switch.
This should go into one wall light terminal on its own.
The second terminal on the wall light switch should have both the red and black in it (to power each wall light)
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