2002 Chevrolet Impala wipers, windshield & visibility problems

While driving down the road the right passenger side mirror exploded - sounded like a gunshot. I was told something hit the mirror causing it to explode. This was based on the mirror casing having scratches on the top. I have never heard of a mirror exploding - for any reason - and neither has anyone else I have spoken to, including the dealership that is fixing my vehicle. Problem was reported to chevrolet but they did not seem concerned about the safety issue.

Brought car and windshield wipers were not timed correctly and I needed a part called plaw - the company said they were fixed but, not 3 months later when heavy rain came my windshield wipers are on my windshield straight up and down right in front of what is supposed to be my visible area. Im 5'3 and I have a seven year old child and I would hate to be on the expressway when it starts raining and not able to see because no one took it seriously..