What are the actual rules on the following situation...
I rang my Dads GP surgery asking that they investigate why a GP didn't visit him as promised when I rang & made him an urgent appointment & even gave 2 possible diagnosis, given his medical history (& mine) & symptoms. Potentially very dangerous given he has significant kidney disease.
I was told a GP would visit him after 11, but may ring first for more information, but would definitely see him today given his age, he's 85. GP rang, but didn't visit & arranged a hospital referral to check his bladder
This lead to my dad collapsing on the floor, soiling himself & couldn't get up. He was like that for over 10 hours until a police welfare check found him & got him to the hospital where he was found to be severely dehydrated & suffering with a very bad case of campylobacter food poisoning infection & he spent 10 days in hospital. Thankfully he's as strong as an ox & though really scary, he's managed to pull through & is back home & much better ... & thanks to the police, he now has a social worker & a Mediline thing to call for emergency help if anything like this happens again.
When I rang to make his appointment before this happened, I suggested he had either a kidney infection, or food poisoning & said that I was very worried about him being dehydrated & he has CDK4 so I felt he needed to be seen urgently by a doctor to check him over.
The lady I spoke to on the phone remembered my making the appointment & was surprised no GP visited him. Passed i pinto the secretary to ask for an investigation. They listened, asked if I had my dads permission to know his medical info, which I said, no, I don't think so, but I am next of kin, I made the appointment. Her attitude after this was far more dismissive & I was left with, we'll talk to the doctor concerned & get back to you in a few days
Over a week now & nothing 
This surgery is dreadful & I've tried many times to get DF to change GPS, they let my DB down badly with delayed treatment that lead to a stroke, but even though he complains, he just won't. The reviews are appalling too. It actually took me 3 minutes short of an hour to get through to make that appointment too. Dad often gives up trying to make an appointment as he struggles to sit long on the phone & gets very wound up by it.
Surely my asking for an investigation means it needs to be done & I should have heard by now?. If not me, DF should have heard as he now knows, agrees & has heard nothing.
What are the rules on this & where do I go next to raise a formal complaint as it doesn't feel like they are doing anything at all. This isn't the first issue with promises made to me on the phone after I've rang on his behalf & then nothing done
TIA