Insurance and Third party complain

Good day

My car was involved in a accident and am a my way client and my car was towed to Precision Auto spray ,where is was fixed ,after fetching it from them,i drove the car three days and it broke where it was fixed the exact part i called miway they told me to return the car there ,but the workshop manager told me that ,the part that is broken its not part of my insurance deal ,my question was to him ,why was this fixed from day one if it was not part of insurance deal ,and i left the car with him ,i called my insurance which is miway i was told that the accessor will go there and check it ,which he di and i was told that its approved ,but when i called Auto Precision Spray they told me that the acessor told them.to call me to fetch my car as the claim its declined after i was told my mi may that is approved please assist me with the query