You are very lucky to walk away from this one. Collect your new jacket, helmet, shirt and medical expenses, -and then keep walking.
For a claim to succeed you need to prove:
1. Negligence
2. Damages
3. Link between the above
4. the quantum of your damages, i.e special damages (specific items -which they offered), plus general damages (such as pain and suffering, loss of income, etc).
You would probably have a hard time in proving sufficient general damages to justify the effort of taking legal action. You could try to squeeze a bit more out of them, but I suggest you then let it go.
RAF is a no-go, as there was no collision with another vehicle.