I work for a bodyshop, your car will only be repaired and put back on the road if it is safe to do so, insurance companies usually go upto 60% of the car value but they are trying to repair rather than scrap these days if it is safe to do so. Have a word with the garage and tell them you don't want the vehicle back see if they can speak to the engineer first, then the engineer will call you and let you know the descision which is 99% final if he does repair it will be back up to insurance standard and so will no go on any register that it has been in an accident. Then if you do not want the car you then sell it on its return.