Has anyone got any advice?

When I just removed the snow from my i30cw (Combi, 126hp, NEUWAGEN), the blow hit me. A 20cm long crack in the fornt window… like out of nowhere. I called my contract workshop, they were quite pampig and meant that cost about 600-700€ and would be more of a case for the insurance. There it would cost me of course 150€ self-defense and I would drive to Carglass. Now I don’t want to pay anything, because that can’t be. I have Is this not a guarantee case? Hyundai meant bene that would be due to the cold and not a problem of the car. Thanks for your tips… Oh yes, I was asked if there is something special about the disc, like rain sensor or something like that? I didn’t know anything about it? I have to turn on the disc wrench manually, but the rear window is only heated but not at the front. Do I have to keep in mind what the new e disc concerns?? THANK YOU!!!