Unacceptable behaviour

About 5 weeks ago I had my windscreen replaced by a third party supplier recommended and sent to me by Santam. I parked my car at a meeting in Klerksdorp and when I returned to my car windscreen had cracked. No chip nothing, just cracked. I called Santam to complain and they send me back to the supplier who they've asked to give an opinion on the matter! Correct me if I am wrong but how do you ask the person that delivered the service to provide an opinion as to whether the service/product they rendered was acceptable and of good quality? Lo and behold the supplier says windscreen had a chip (Which was and is not the case!) 7 full days later and i'm still waiting for feedback and driving with a windscreen that is likely to fall into the dashboard soon as the cracks keeps getting worse. Insurance good and proper my foot!!!