My car written off by road rage ASDA driver

[TheHussar]

While driving into Leicester I overtook an ASDA delivery van in a safe manner next thing he is behind me inches off my bumper flashing his lights and sounding his horn, this continued for about a hundred meters until he came along side and drove into my car.
ASDA admitted liability and their insurance paid for my older car to be written off but now I can't afford another car, I want to sue ASDA but where and how do I begin?
I might add I had PTSD prior to the incident but it has triggered it and now I have sleepless nights reliving the incident.

[PallasAthena]

What is it you want to sue Asda for? It sounds like they have already paid you the full value.of your old car.

[des8]

I assume you are looking for recognition for the mental stress.

Have you had any medical treatment following the incident?

When Asda's insurers paid out did you sign a full and final settlement?

How long ago was the incident?

It won't be easy, even if possible>