Social Services - advice wanted

I would like to ask for advice on behalf of a friend.

My friend is a vulnerable woman with learning difficulties, but is able to live independently. She has been divorced from her abusive ex husband for many years.

She has 2 adult daughters, also with learning difficulties, who were being cared for by her ex husband.
Until recently, she saw her daughters on a regular basis. However, this stopped at the end of 2025, when her daughters were removed from her ex husband by social services and taken into adult social care.

Social services have been appalling from start to finish:

1. They sent my friend's address to her abusive ex husband, so now he knows where she lives. Surely this is a GDPR breach?
2. They have never sent my friend any letters or information explaining what was happening with her daughters, in spite of repeatedly promising to do so, and being chased up many times.
3. The social worker responsible for the case has never returned any of my friend's calls.
4. The social worker has claimed that my friend does not care about her daughters, which is obviously incorrect.
5. Rude, bullying and abusive behaviour from the social worker and care staff towards my friend and her daughters.
6. They did not inform my friend about a family court hearing regarding her daughters' welfare, then criticised her for not being there. How on earth is she supposed to turn up to a court hearing that she is not aware of?
7. Now they have cut off all contact with her daughters, with no explanation regarding why.

Both my friend and her daughters have stated that they want to see each other, but their wishes have been ignored by social services and care staff.

There is a very real risk that my friend will never see her daughters again, through no fault of her own.
She is distraught and does not know what to do.

Please help! Any advice welcome.