iMessage is blocked for no reason
my iMessage got blocked
iPhone 6s, iOS 15
Question marked as
"They" who? Who exactly told you this, what exactly did they say, and when and how? Please provide full details about your situation (leaving out any personal details like phone numbers etc). That way we don't have to play "20 Questions" to try and get to the bottom of your issue.
Making a complete guess, see if this applies to your situation:
If your Apple Account is locked, not active, or disabled - Apple Support
Regards.