2013 Volkswagen Passat wipers, windshield & visibility problems

While driving 65 MPH on interstate in nice weather and low traffic the sunroof of my 2013 volkswagen passat exploded outwards creating a large hole 18" - 20". It was a loud gunshot type noise and some glass ended up on our faces and arms creating minor cuts. Most of the glass was blown outside the car and damaged the roof and trunk. When the explosion occurred the windows were closed and the sunroof was also closed and the air conditioner was on. We were not under any overpasses or near buildings or road debris.

I bought this vehicle new and had the heating system serviced at the VW dealer. The heater core has fail two times, both times I had it replaced at a VW dealer. The first time was on 12/21/2016, I contacted VW and they would not cover any of the emplacement cost. The second time was on 01/24/2018, the dealer representative said VW would cover half of the cost of the repair. I paid for my have and then contacted VW to see if they cover the whole cost. They said they would not. Thank you.