and it's not letting me change by my Apple ID passcode
Or do you mean Apple ID password?
If so read again -> Related Article -> If you forgot your Apple ID password
Then see this Apple article: What to do after you change your Apple ID or password
What to do after you change your Apple ID or password - Apple Support
If you forgotten your passcode, see this Apple article: If you forgot your iPhone passcode
If you forgot your iPhone passcode - Apple Support
If you can’t get your iPhone to show the recovery mode screen and you need help, contact Apple Support.
See also the following Apple articles:
Recognize and avoid phishing messages, phony support calls, and other scams
Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support
If you think your Apple ID has been compromised
If you think your Apple ID has been compromised - Apple Support