First, a person wrote to me, saying that he bought a knife in CS go around 230$ and he was tricked, so he thought it was me and sent a report on me, so now I have to prove that it's not me. They sent me an email from an agent who asked me to contact me in discord, and then my friend told me that it was a scam. To be honest, I'm very scared right now because I gave them my purchase history, what should I do to prevent them from taking over my account??