I was rear-ended by a taxi a couple of weeks back - slow speed collision - but enough to split the rear clam on my Elise S1.

So- put the car into the 'approved Admiral bodyshop' - which is also the bodyshop that Murray Motors (Edinburgh) use - so they are Lotus approved.
Bill comes to 3900 - and the garage get the go-ahed to repair. Things get a bit strange when I call the garage however. They have offered a 'cash settlement' as they do not want to provide a warranty (presume its a crash repair warranty). Then they go on about deducting VAT & my excess ? They say its part of my T&C that I have to take a settlement ?
1. I'm not claiming against my policy - the other party accepted liability so its his insurance I'd be claiming off - right ?
2. Its not my excess - its the other partys surely. So why try to deduct my excess ?
It all went a bit strange when I asked about paint matching - as I dont want a shiny new looking back half of a car.
I am not claiming for a full respray - but I think my car will devalued accordingly - due to the obvious shiny new rear section.
Am i entiteld to the repair without the VAT or Excess deducting ?
Any advice regarding the paint matching - and the Insurance Company not wanting to provide a warranty. (Presumably a cash settlement would stop me complaining about paint matching / which would be a warranty claim?)
Its not my policy I'm claiming against - my T&C dont apply - surely !! My solicitor is phoning tomorrow - just wondering if there is any advice out there !