Bad service

My car was ****** on the 15 of April and stille strugling to get my car fixed properly the assesor reckeons me it cant bethat much damaged in an half an hour time. My car was stripped in the inside mydash they tried to take out. now that i went and got my it was not fixed as it shouldve been. The alarm system central locking my radio was still out nothing was properly fixed. When i took the car to someone else as i was told by the assesor, now he does not want to pay the full price. He said is no need to replace the dash because my car is an old model. Why do we as clients have to pay redicules prices fir insurance if they dont want to fix the problems and see to it that it is in a condition it was before it was ******. It is un acceptable and unfair. I just want my car the way it was. PLEASE PLEASE Please PLEASe