what you need to do is then get an agreed cost of repair, dont take it to the insurance's recommended bodyshop. and also prove the worth of your car, start scanning, printing, copying adverts of similar cars to yours
so for example, you then go to insurance and say lets agree on £500 to repair the car, its worth £2000. they send you out a cheque you repair the car yourself, everyone is happy & your car aint wrote off!