Impersonation is not always the same problem as copyright infringement.
Document the fake presence first
Save the profile URL, username, screenshots and examples of copied material.
Separate the issues
Identify whether the matter involves copied copyrighted content, trademark or brand misuse, identity impersonation, fraud or phishing.
Preserve proof of the legitimate identity
Useful context can include the official website, long-standing social profiles, business records and original brand assets.
Platforms make their own final decisions about account removal, username changes and other action.
See the Impersonation & Brand Protection section of the Help Center.