Sorry to see that man. The first one hurts! If it is just the topsheet it was likely another boarder or a skier in the lift line. Edges and top sheets do not get along. You can trip the old material if it is really thrashed or clamp it back down. Slow epoxy to fix. Perfformance and longevity will not be affected at all. If it is more than just topsheet let us know.
Do you think I should report the damages to NS so if anything else goes wrong with the board it would still be warrantied in the future?