Eww that girl keeps sending me dirty, gross videos i don't want!.... what do i do?

My last question was what i should say to her after she sent me that gross videos. So i followed your advice and told her i didn't find those videos attractive and it was a major turn off. I even told her i didn't want to be friends anymore and she when crazy on me. She thought i was weird for not liking the videos. Now she keeps sending me more and more videos that are gross!!!!! The first was her pouring Elmer's glue into her mouth then gargling it with a banana. Then the second was her fitting and in tire gl cup up her and breaking it. Then she pulled the gl out and blood. That will never get out of my head forever! The finale one was of her placing a hot steaming spoon up her and burning the inside. I feel like i can never get over these videos and im scared to death what will come next. I couldn't even sleep last night. And yes she is under 18. Help idk how to block her on my phone or email. Please i need your advice before it gets worse!