As I said yesterday, I'm sorry to see this.
However I can see where the company is coming from.
They hired/rented an individual one of their bikes with presumably T&C's presented and accepted.
And here is where the problems start, can a 16 year old accept the hire without leaving a valid Ccard etc. What happens if the bike suffers a total loss, who pays, presumably the last renter? What happens if the hirer causes an Road Trafic Infringement (sorry fek knows what they call fekwittery nowadays) , who's responsible etc.
LIME rented the bike in good faith and the renter left it lying at their ar*e, I am struggling to see how that is the responsibility of LIME and not the renter.
I suspect your best chance of recovery is by pursuing the person responsible for the damage which is the renter/16 year old who walked off and heard it hit your car but kept walking. Is it possible he did it on purpose (fek yer man with the sw*nky Porsche stylee) with the plethora of other bikes falling over. Considering where the bike was abandoned is it safe to assume they live nearby?
I really am sorry to see your car was damaged through absolutely no fault of yours, I hope you get it sorted and it doesn't prevent your enjoyment of it.