Disgruntled disappointing disgusted service

I urgently need a matter resolved. You client knocked into me took responsibility and he agreed as per an affidavit that its his fault, however the insurance only wants to settle 60% of the claim due to client only being 60% responsible yet he is admitting its his fault. What is more disappointing I called the panel beater they advised that this is not the exact price as they have not seen the vehicle this is basically what your assessor put together. The norm is they will fix the vehicle and as they find other issues they than normally add onto your system what happens in this case. I am disappointed the amount is just 60% of something that was not even validated by a panel beater. Your client has inconvenienced me with his negligence. I had to pay tow trucks almost R9000 and another R9000 to rent a vehicle. Now I get his insurance that wants to exploit and take advantage of a third party. This is not on I will not accept this. Is this what Outsurance does to repudiate cases. Even the police document has a clear report outsurance client is at fault of which he admitted.