someone is phishing my account

Report it here: Avoid phishing emails, fake 'virus' alerts, phony support calls, and other scams https://support.apple.com/en-us/HT204759. "If you receive a suspicious email that looks like it's supposed to be from Apple, please forward it to reportphishing@apple.com." Forward it as an attachment.

. You won’t receive a response.

reportphishing@apple.com

What are they doing? As a precaution, change your password.

 Apple ID Password Change.      

 What to do after you change your Apple ID or password - Apple Support     I suggest doing this before you change your Apple ID or password.