Taking over a year to finalize claim

Had in incident with my vehicle in Desember 2018 the most of my 2019 was spent arguing with panelbeaters and outsurance, the fitted the incorrect bumper to my vehicle and left paint all over my car, there was missing bolts and the entire experience was just substandard. Every time we meet outsurance would agree to have my vehicle repaired only to find out later they cut costs and my vehicle would once again be worst off than previous.