Repairs complaint but no response from Outsurance

My car went in for repairs at a panelbeater, quality of work carried out was unacceptable, I contacted Outsurance regarding the matter, it has now taken them 2 days to return my call with still no success, I am quite desperate to resolve the matter but am getting no satisfaction. Car manufacturer wants to void the panel and paint warranty on my car due to the bad repairs, my car is less than a year old. They are very quick to take your premiums but aren't interested in helping when you have a query against them or a supplier