Bad Customer Service

Car went for repair to Savannah Coachworks in Pts West. After one Mont car was fixed. Driving home the airbag sensor light came on and starts misfiring. I called the panel beaters explaining the matter. They reset the cluster and cleared airbag earning but car still misfiring. They tried calling the assessor but could not get hold of him. I then called the call centre to log a feedback from the assessor and was told within 24/48 hrs. After 72hrs still no feedback to find out assessor left for the weekend and only be available Monday. Meanwhile I cannot drive my car and am stuck. Very disappointed. Thinking of changing insurance