A 15-year-old girl viciously slammed to the ground and stomped on by a teenage boy after refusing his advances has been repeatedly sent video of the stomach-turning attack by twisted tormentors — forcing her to relive it, her mom told The Post. Lucinda Arroyo, of East Harlem, fears her daughter will be re-traumatized by footage sent by kids who see the sick assault as “entertainment,” she said Thursday. “She has people sending videos of herself on her phone and I have to take away her phone,” Arroyo fumed. “The video was being passed around like entertainment, and that pissed me off the most. … It’s not entertainment. A 14-year-old boy stomped on an East Harlem girl who refused his advances, her mom said. Instagram / @coronavirusny “This is not even bullying. [It’s] assault and he could have killed her.” Arroyo now fears her daughter, whose name The Post has not disclosed, will suffer from bouts of depression and anxiety after watching footage of the shocking caught-on-camera assault.…