Equal quotation or bad services

Smart Insurance authorised me to go repair my scratches at Phophis Autobody, who has terrible customer service. My claim has been authorised since November 2014 and up to date the panel beater keeps on postponing. Now smart insurance is insisting that I go and get a quotation equal to what their preferred Phophi's has quoted whereas my contract with them says I am limited to claim to a different amount or I go to repair my car with the bad service provider and poor customer relation panel beater they have authorised me to. They are forcing me to go to an unreliable business man who does not honour time and his business..