warranty issues

Hi All! The car is 2018 Buick Regal Sportback with 411 miles sold as NEW. Dealer told me it was "event" car. I bought a NEW car from dealer (at least they told me so). However when I go to my.buick.com it says your warranty is "3 Years, 19 Days Remaining", when it should be very close to 4...

My driver's side mirror has developed a problem with paint peeling off the top. I visited my local Buick dealership and had the service manager take a look at it. He took pictures of it and sent those pictures to the regional Buick office. After two weeks he told me Buick would not cover...