You could argue many points in your defence -
- The ramp wasn't closed, but remained open whilst in a slippery/icy condition
- No warning signs as to the ice on the ramp
Personally, I would ask you
- If you knew/had an idea that the ramp was icy, why did you risk an accident rather than find alternative parking?
- As you was waiting for recovery anyway, why did you not ring the police to report the accident, as you have said yourself, you knew you should of.
I suspect that you are going to be summonsed to mag's court regarding this.
Recovery of the costs for repairs, maybe compensation.
I don't know what the outcome in court will be, however it is likley that you will get high number of points (if you've already got points, then maybe a ban)
Heavy fine
All because you failed to make a phone call!!