I’m so creeped out rn (there may be updates to this)

I discovered that someone at my old school has been impersonating me. According to a friend, an old friend of mine interacted with a girl in Fortnite, claiming to be me. She stated that she was Kenzie (my name) and used to attend my old school but now goes to my current one. What's worse is that this person has been saying weird things to my old friend, suggesting that I'm single and interested in them, despite the fact that I have a boyfriend. On the phone they made these weird noises, saying my old friend’s name but in a weird way. Even when I confronted the impersonator with evidence, they refused to admit their actions, despite their phone number being clearly visible in the screenshots. Eventually, I decided to block them to prevent further harm, since they obviously weren’t going to admit what they did. At this point, I don’t even care who it is and why they did it, I just simply want the impersonation to stop, not only for my sake but for others as well.