Yeah - I had the same problem with the police records, you could appeal it.
The records i've posted are from probation and held by national prison an probation. As for the information from social services, you would need to write to them.
I've worked on a few govt contracts (FCO - FIRECREST, HO/MOJ - POISE/INDIGO, MOD - DII/LYCHGATE and NATO - ISAF) the snag you have is that (esp with the police) if its intelligence related then it falls outside of the scope of GDPR. You can appeal to a RIPA tribunal if you feel you've been under surveillance or monitored covertly. They'll investigate it, but they dont have to tell you what they found, or even if you were subject to surveillance!
If it contains emails (inter departmental) and the emails contain staff names, then staff can request this information be redacted. If you're not happy with what you got back, then you can complain to the department and appeal it to the ICO if you need to.