Could you please advise me on how I should proceed following a hit-and-run incident?

Last July my car, waiting legally at the side of a road, was hit. I was in the car. The whole incident was caught on dashcam and subsequently reported to Kent Police who were provided with a copy of the dashcam recording.

The police decided that it was "not in the public interest" to pursue the matter and would not give me the keeper's details. I then applied to the DVLA (special delivery), again giving them access to the recording, and enclosing a cheque for the £2.50 fee, but after the 6 month expiry of the cheque it had not been presented and there was still no reply. My legal costs insurance then established that the car is insured with Admiral Insurance and said I should contact them direct.

There was not so much as an acknowledgement from Admiral Insurance of my several emails (and providing the dashcam recording) for more than 2 months, and only after I followed up my threat of adding interest as well as taking legal action did they respond. Their reply was that they would not look at the matter because it was not the policyholder, i.e. the hit-and-run driver, who had not reported it to them but the victim of the offence

I would like to lodge a complaint about Admiral Insurance to the Financial Services Ombudsman, but it appears that only the policyholder can do so. Since I have no way of establishing the keeper of the car in question and Admiral Insurance are refusing to enter any dialogue, how should I proceed, please?