help

This is everything Apple said, If you get an error when trying to activate iMessage or FaceTime - Apple Support and the last thing is to contact Apple support. They are not here, this is a user to user support forum.

If you contacted Apple, what did they tell you?

Sounds like you have a lot more than a failure in iMessage here. I suggest you provide a complete rundown of what you have done, and what works and doesn't work on your device. Do you have cellular account and valid service?

What problem are you experiencing?

Can you make calls?

oh so you don't have a active line ?