No help with after sales

Wanted to give a 5 star but this is something that I cannot leave alone. Buying the NEW vehicle was a great and quick service. After getting the vehicle within in less than 24 hours I reported a problem, this weird stain on the right rear passenger side window, reported it and went to PG glass and they gave a report that it looks like chemicals that is spilt on the window...now I dont come near chemicals and and the Nissan Milnerton Team says all that there want a mark like that on the window. I ask for photos and report before derlivery but there is none. Vehicle was delivered to me without me having the time to proberly inspect and they just asked me to sign the form. So now i contacted the manger of the branch and there is all kinds of excuses, waiting for the boss etc. Great sales teams but needing help with this kind of problem is a bad reflection on the Nissan Milnerton team.

I have gotten the email of the Dealer principal and mailed him, yet i dont get any feedback from them.