You must write this all story to paksuzuki (in more decent manner:P ), they will surely take action.
A friend of my brother did some work on car at some of their dealership, few days later someone pointed out him that your windscreen is very much scratched, later that friend of my brother got to know that his windshield has been changed. He sent paksuzuki an email and after providing few proves paksuzuki ordered dealership to fix a new windsheild in his car (car was alto).
So, better go in an official manner....
agay tuadi marzi...