Car repair claim

I am quite disapointed in the way they are handling our claim, the other driver drove into my husbands car cause he apperently did not see my husband crossing the road, he did not apply brakes nor tried to prevent the accident. He is allready paid out cause his car is a write off we can still fix our car we got 3 quotes but according to integritas solution we have a 30% guilt in thia accident that I think ia untrue because before my husband crossed the road he checked and the road was clear and all of a sudden as he crossed this guy bumped him. What can we do. If anyone can please advise, I know that it comes from the assesors and that guys 3rd party claim, but they cant say that we are also responsable, now we are struggling. Please if someone can advise. I think this is unfair due to that we are not at fault with the accident, cause he drove into my husband .