front drivers side wing

i have just found out she did get a letter from the mechanicl surveyor stating that her car should be written off and giving her a value for . wich she had to agree to and return signed. no copys.nothing else in writing.all contact has been by phone apart from the letter.

third party no witness

no covering letter

?:??:?help. my daughters car was hit whilst stationary at a juction, the other car slid into her (icey conditions). the other driver admited liability to her ins, company my daughters car was collected by a garage commisioned by the ins, company. the rang her told her the car was a right off, and if she agreed the car would be scrapped and she would be given what they considered a fair price for her car, she accepted. now they say the other driver has changed her origanal statement and it was not her fault . the ins, company now want my daughter to admit she was to blame and are trying to renage on their first offer. what can we do.???????