Oh Scouse I feel for you, I really do.
SS is made clear by the age of your youngest. Everything gets reported to childrens services when you have a baby under 1yr, as horrifically, that's when abuse escalates, and more fatalities happen. Not applicable in your case, but nowadays there's a blanket rule, but from a good place.
So I'd say, don't expend anymore mental or emotional energy on it. Wipe it from your brain and if they get round to visiting/ phoning, then you can focus on it then...
If it helps, i think I can relate to what you, & your dp, are going through, both of you, in different ways. But it's probably not for now, except to say, my heart goes out to you, so so much, and I hope there's someone there to give you a hug xxxxxx
I am also wondering, if you're that person, the one that no matter what you feel like, no matter how much you want to collapse, to not cope, to scream and cry, that you can't. Because it won't change anything, and you have to keep going (For DS in my case).
Anyway, I am thinking of you, and your partner 